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Best Education Systems in the World: What the Evidence Shows

Education for all

Which country has the best education system? The principal international sources used for this comparison do not publish one universal winner across academic performance, equity, access, creativity, student belonging, system structure, and every other educational goal.

Singapore provides the clearest answer when the criterion is average performance among 15-year-olds in the OECD PISA 2022 results. It recorded the highest mean scores in mathematics, reading, and science and also led the separate creative-thinking assessment. Other countries and participating economies stand out under different measures, including equity, resilience, school belonging, and mathematics achievement at particular grades.

As of 18 July 2026, PISA 2022 remains the latest released PISA cycle. The OECD PISA programme schedule states that the initial PISA 2025 results will be released on 8 September 2026. PISA-based comparisons will therefore require review after that release.

Answer Summary: No education system has been shown to lead across every valid measure. Singapore leads the latest PISA evidence for core academic performance and creative thinking. Japan, Korea, Lithuania, Chinese Taipei, Finland, Canada, Ireland, Macao (China), and other systems stand out under different criteria. A responsible comparison must identify the outcome, assessment, student population, evidence year, methodology, and limitations.

Table of Content

  1. Is There One Best Education System?
  2. What Does “Best” Mean in Education?
  3. What PISA, TIMSS, and Other Global Data Measure
  4. How This Comparison Was Developed
  5. Education Systems That Stand Out by Outcome
  6. Profiles of Selected Education Systems
  7. Which System Features Are Worth Examining?
  8. What Other Countries Can Learn—Without Copying
  9. Common Myths About Global Education Rankings
  10. How Readers Should Use Education-System Comparisons
  11. What the Evidence Supports
  12. Sources, Method, and Update Note

Key Takeaways:

  • No official dataset names one universal education-system winner.

  • Singapore led the three core PISA 2022 domains and creative thinking.

  • PISA assesses 15-year-olds, not every learner or institution.

  • TIMSS assesses mathematics and science in grades 4 and 8.

  • Performance, equity, access, creativity, and belonging are separate measures.

  • National averages do not describe every school or learner.

  • Policies should be adapted and evaluated rather than copied unchanged.

Is There One Best Education System?

There is no single defensible ranking that covers every important purpose of education.

Singapore is the strongest answer when “best” refers specifically to average PISA 2022 performance. Its mean scores were 575 in mathematics, 543 in reading, and 561 in science. The OECD reported that Singapore scored significantly higher than every other participating country or economy in all three core domains. 

A different criterion produces a different group of notable systems. The OECD identified ten participants as highly equitable under its combined measures of socio-economic fairness and inclusion. It separately identified Japan, Korea, Lithuania, and Chinese Taipei as resilient across mathematics performance, equity, and students’ sense of belonging between 2018 and 2022.

The useful question is therefore not simply, “Which system ranks first?” It is, “Which system performs strongly on the outcome relevant to this comparison?”

A system may record high average test scores while facing gaps in access, regional provision, student belonging, or outcomes for particular groups. Another may be comparatively equitable without recording the highest international mean score.

What Does “Best” Mean in Education?

“Best” is a search term rather than a fixed scientific category. It becomes meaningful only when the comparison criteria are clear.

What is an education system?

An education system includes the institutions, governance, curriculum, teaching workforce, assessment arrangements, funding, access, learner support, qualifications, and progression pathways that shape education within a jurisdiction.

This definition is broader than assessment performance. PISA and the Trends in International Mathematics and Science Study (TIMSS) provide important evidence about selected learning outcomes, but neither measures every feature or purpose of an education system.

For more detail on structures and credential terminology, see Collegenp’s guide to education-system models and qualification levels.

Why this article uses “country or economy”

International assessments do not classify every participant as a sovereign country. Depending on the source, results may be reported for countries, economies, jurisdictions, or benchmarking participants.

This article retains the terminology used by the OECD and the International Association for the Evaluation of Educational Achievement (IEA). Entries such as Macao (China), Hong Kong (China), and Chinese Taipei are not silently relabelled as countries.

Academic performance

Academic performance refers here to demonstrated knowledge and skills in assessed subjects.

PISA examines how 15-year-olds apply mathematics, reading, and science knowledge and skills. TIMSS examines curriculum-related mathematics and science achievement among students in grades 4 and 8. The assessments answer related but different questions.

A high average score supports a claim of strong performance on that assessment. It does not establish that every student, school, subject, region, or educational pathway performs equally well.

Equity and inclusion

Equity considers how strongly factors such as socio-economic background are associated with educational opportunities and outcomes. Inclusion considers whether a broad share of the relevant population reaches a defined proficiency level.

The PISA 2022 equity analysis combines socio-economic fairness with the share of all 15-year-olds reaching at least basic proficiency in mathematics, reading, and science. The resulting classification is tied to those indicators and does not mean every inequality has been eliminated.

Creative thinking

The PISA 2022 creative-thinking assessment examined students’ ability to generate, evaluate, and improve original and diverse ideas.

Singapore, Korea, Canada*, Australia*, New Zealand*, Estonia, and Finland were the seven highest-performing participating systems, in descending order. Singapore achieved a mean score of 41, compared with an OECD average of 33. The assessment does not measure every form of artistic creativity, innovation, imagination, or practical invention.

Well-being, belonging, and resilience

The OECD’s PISA 2022 resilience analysis considered mathematics performance, equity, and students’ sense of belonging at school.

Japan, Korea, Lithuania, and Chinese Taipei met the OECD’s overall resilience definition. They performed at or above the relevant benchmarks in 2022 and showed no deterioration across the three dimensions between 2018 and 2022.

This is a statistical classification for a defined period. It is not a prediction that these systems will withstand every future disruption.

Access, participation, and pathways

Assessment results describe the students represented in an assessment. A wider system comparison must also consider who enters education, remains enrolled, completes a level, and progresses to further education or another pathway.

The UNESCO Institute for Statistics Data Browser provides internationally comparable data and metadata covering education and Sustainable Development Goal 4 indicators. The OECD’s Education at a Glance 2025 covers educational attainment, access, participation, finance, teachers, system organisation, and outcomes.

Reference years, definitions, and geographic coverage can differ between indicators. A recent database update does not necessarily mean every underlying national observation comes from the same year.

For a separate explanation of how public funding affects access, see why education is free in some countries. That page is related reading rather than evidence for the rankings in this article.

What PISA, TIMSS, and Other Global Data Measure

Global education datasets are not interchangeable. Their populations, purposes, frameworks, and reporting rules differ.

Source Population or level Main coverage Appropriate use Main limitation
PISA Mainly 15-year-olds Mathematics, reading, science, and an innovative domain Comparing applied knowledge, performance, equity, and student experience Does not assess every age, subject, institution, or purpose
TIMSS Grades 4 and 8 Mathematics and science Comparing curriculum-related achievement at defined grades Uses different populations and frameworks from PISA
UNESCO UIS Learners and systems across education levels Access, participation, completion, proficiency, and SDG 4 indicators Examining system reach and educational participation Reference years and data availability vary
Education at a Glance Early childhood through tertiary education Attainment, access, finance, teachers, organisation, and outcomes Examining education-system structures and conditions Coverage and emphasis differ by indicator and edition

These distinctions follow the official OECD, IEA, and UNESCO descriptions of the datasets.

PISA: Applied knowledge among 15-year-olds

PISA is an OECD international comparative assessment of 15-year-old students. Its core domains are mathematics, reading, and science, while each cycle also includes an innovative domain. Creative thinking was assessed in PISA 2022.

PISA compares students of approximately the same age rather than students enrolled in the same grade. Its country- and economy-level results are estimates based on sampled students, not examination results from every learner.

An asterisk attached to a PISA participant means the OECD advises caution because one or more sampling standards were not met. The estimate may remain informative, but the qualification should stay visible.

TIMSS: Grade-based mathematics and science

TIMSS is organised by the IEA and assesses mathematics and science achievement in grades 4 and 8. Its framework is more closely related to intended and taught curricula than PISA’s age-based, applied-knowledge approach.

In the TIMSS 2023 grade 8 mathematics results, Singapore, Chinese Taipei, Korea, and Japan recorded the highest estimated average achievement. These are subject- and grade-specific findings, not a combined ranking of national education systems. 

PISA and TIMSS compared

Feature PISA TIMSS
Main student group 15-year-olds Grade 4 and grade 8 students
Core subjects Mathematics, reading, and science Mathematics and science
Main orientation Applying knowledge and skills Curriculum-related achievement
Reporting units Countries and participating economies Countries and benchmarking participants
Appropriate use Comparing competencies near the end of compulsory schooling Comparing achievement at defined grades
Main caution Does not measure the whole system Should not be merged directly with PISA scores

UNESCO UIS and OECD indicators

UNESCO UIS and OECD indicators provide information that international assessments cannot supply, including access, participation, completion, attainment, finance, staffing, and system organisation. (UIS)

The relevant indicator, population, reference year, and definition must be checked before comparing jurisdictions. Indicators with similar names may measure different age groups, education levels, or outcomes.

Why university rankings are not school-system rankings

University rankings assess institutions or selected higher-education indicators. They do not demonstrate the performance, fairness, access, or student experience of an entire primary and secondary education system.

A country may have several internationally visible universities while showing uneven school-level outcomes. Another may perform strongly in school assessments without dominating university rankings.

Combining school performance, university reputation, tuition, safety, immigration rules, and employment indicators creates a new index whose result depends on the publisher’s chosen measures and weights.

Study-abroad suitability is also a separate question. Programme quality, admission requirements, language, tuition, housing, immigration rules, and qualification recognition matter to applicants, but they do not identify the strongest national school system.

How This Comparison Was Developed

This article uses a criteria-first method rather than a combined one-to-ten ranking.

The comparison follows five rules:

  1. Each finding is attached to a named outcome.

  2. The assessment and evidence year remain visible.

  3. Countries, economies, and benchmarking participants retain the source’s terminology.

  4. Sampling and methodology cautions remain attached to affected findings.

  5. No policy is presented as the cause of a result unless the evidence supports that conclusion.

The main evidence base includes PISA 2022 Volumes I–III, IEA TIMSS 2023 results, UNESCO UIS indicators, and Education at a Glance 2025. These sources examine different populations and system features and are not combined into a Collegenp composite score.

The evidence does not prove:

  • That the leading system on one measure is strongest on every outcome

  • That a national average applies to every learner or school

  • That one policy caused a high score

  • That a policy will produce the same result in another jurisdiction

  • That higher expenditure automatically produces better outcomes

  • That school-system performance determines study-abroad suitability

Education Systems That Stand Out by Outcome

The following table identifies systems that stand out under named measures. It is not a universal ranking.

Dimension Systems that stand out Evidence What the evidence supports Main limitation
Core PISA performance Singapore PISA 2022 Volume I Highest mean performance in mathematics, reading, and science Covers participating 15-year-olds
Creative thinking Singapore; Korea; Canada*; Australia*; New Zealand*; Estonia; Finland PISA 2022 Volume III Seven highest-performing systems in the creative-thinking assessment Does not measure every form of creativity
High equity Canada*; Denmark*; Finland; Hong Kong (China); Ireland; Japan; Korea; Latvia*; Macao (China); United Kingdom* PISA 2022 Volume I Met the OECD’s combined fairness and inclusion criteria Does not mean all inequalities have disappeared
Overall resilience Japan; Korea; Lithuania; Chinese Taipei PISA 2022 Volume II Met the OECD’s performance, equity, and belonging criteria Applies to defined measures and the 2018–2022 period
Grade 8 mathematics Singapore; Chinese Taipei; Korea; Japan TIMSS 2023 Highest estimated average achievement in the published comparison Not a whole-system or all-age ranking

The outcome groups and qualifications come from the official OECD and IEA reports. (OECD)

Core PISA 2022 performance

Singapore recorded mean scores of 575 in mathematics, 543 in reading, and 561 in science. Macao (China), Chinese Taipei, Hong Kong (China)*, Japan, and Korea also appeared among the strongest mathematics performers. (OECD)

PISA scores are estimates rather than permanent positions. Statistical uncertainty means small score differences do not always establish a meaningful rank order.

Highly equitable systems

The OECD classified Canada*, Denmark*, Finland, Hong Kong (China), Ireland, Japan, Korea, Latvia*, Macao (China), and the United Kingdom* as highly equitable in PISA 2022.

The classification required both high socio-economic fairness and a large share of all 15-year-olds reaching basic proficiency in mathematics, reading, and science.

It does not mean every learner or school experiences equal conditions. Regional, linguistic, disability-related, migration-related, socio-economic, and school-level differences may remain.

Creative-thinking performance

Singapore achieved a mean creative-thinking score of 41, compared with an OECD average of 33. Korea, Canada*, Australia*, New Zealand*, Estonia, and Finland completed the seven-system highest-performing group identified by the OECD.

The pattern differed from the three core-subject results. Czechia, Hong Kong (China), Macao (China), and Chinese Taipei performed at or below the OECD average in creative thinking despite scoring above the OECD average in mathematics, reading, and science. This shows why one academic measure should not represent every learning outcome.

Overall resilience between 2018 and 2022

Japan, Korea, Lithuania, and Chinese Taipei met the OECD’s overall resilience criteria across mathematics performance, equity, and students’ sense of belonging.

Twenty-one other systems met the resilience criteria in one or two of the three dimensions.

The classification identifies an observed pattern under the OECD methodology. It does not establish which policies caused the result or predict performance under future disruptions.

TIMSS 2023 mathematics

TIMSS 2023 provides grade-specific evidence rather than one overall system score.

Singapore, Chinese Taipei, Korea, and Japan recorded the highest estimated average achievement in grade 8 mathematics. Other TIMSS results should be read separately by grade and subject.

Adding multiple TIMSS results together—or merging them with PISA scores—would create a new index that the IEA and OECD did not publish.

Profiles of Selected Education Systems

These profiles describe evidence-supported strengths and limitations. They are not positions in a universal league table.

System Evidence-supported strengths Main qualification Useful comparison question
Singapore PISA core domains, creative thinking, and strong TIMSS grade 8 mathematics Assessment leadership does not cover every educational goal How closely are curriculum, teaching, support, and assessment connected?
Japan Core performance, equity, and overall resilience PISA does not identify one causal policy Are performance, fairness, and belonging monitored together?
Korea PISA performance, creative thinking, equity, resilience, and strong TIMSS mathematics National averages do not describe every student experience Does the system monitor learning and student connection together?
Estonia Above-average core performance and high creative-thinking performance Not part of the four-system overall resilience group Can subject knowledge and broader problem-solving develop together?
Finland Equity and high creative-thinking performance Current evidence does not support an automatic number-one label How can fairness be evaluated beside performance?
Canada* and Ireland* OECD high-equity classification; Canada* also in the highest creative-thinking group OECD sampling cautions apply Are subgroup outcomes consistent with national averages?
Lithuania and Chinese Taipei Overall resilience; Chinese Taipei also strong in mathematics Resilience has a defined period and methodology Can performance and equity be maintained during disruption?

Singapore

Singapore stands out most clearly in the current international-assessment evidence. It led the three PISA 2022 core domains and the creative-thinking assessment and recorded the highest estimated average achievement in TIMSS 2023 grade 8 mathematics. 

These findings support a claim of strong assessed performance. They do not show that every student has the same experience, that every educational purpose is equally well served, or that one identifiable policy caused the results.

Japan

Japan combined strong PISA performance with inclusion in the OECD’s highly equitable group. It was also one of the four systems classified as resilient across mathematics, equity, and school belonging.

Japan’s profile shows why academic performance can be considered alongside fairness and student experience. The assessment data alone do not identify which curriculum, governance, teaching, or cultural factors produced the pattern.

Korea

Korea appears across several measures: strong PISA performance, high creative-thinking performance, high equity, overall resilience, and high achievement in TIMSS grade 8 mathematics.

This breadth makes Korea relevant to a multidimensional comparison. It does not justify assumptions about every school, classroom, learner, or educational purpose.

Estonia

Estonia performed above the OECD average in the three PISA core domains and was among the seven highest-performing systems in creative thinking. 

Its results make it useful for examining subject knowledge alongside broader problem-solving. They do not amount to a whole-system judgement covering access, progression, pathways, and every aspect of student experience.

Finland

Finland remains relevant in international comparisons, but current evidence does not support presenting it as the automatic universal leader.

It was included in the OECD’s highly equitable group and among the seven highest-performing systems in creative thinking. Those are important strengths on defined measures, not evidence of superiority across every outcome. (

Canada and Ireland

Canada* and Ireland* were included in the OECD’s highly equitable group. Canada* also appeared among the seven highest-performing systems in creative thinking. 

The asterisks must remain because the OECD advises caution regarding sampling standards. The qualification is part of the finding rather than an optional footnote.

Lithuania and Chinese Taipei

Lithuania and Chinese Taipei were among the four systems meeting the OECD’s overall resilience criteria. Chinese Taipei also appeared among the strongest systems in PISA and TIMSS mathematics comparisons. 

Chinese Taipei retains the participating-economy terminology used in the assessments. Neither profile supports a broader claim of permanent or universal superiority.

Which System Features Are Worth Examining?

International assessment results can identify outcomes that deserve closer study, but they do not prove that one common policy causes strong performance.

The following points are system-review questions rather than verified causal explanations.

Coherence between goals, teaching, and assessment

A system can examine whether curriculum expectations, teacher preparation, learning materials, assessment, learner support, and progression rules point in the same direction.

For example, a curriculum may state that reasoning matters while examinations mainly reward recall. That would create an implementation problem even if the formal curriculum appeared well designed.

Teacher and learner support

A system review should consider teacher preparation, professional learning, workload, curriculum guidance, collaboration, and access to specialist support.

For learners, relevant questions include language support, disability access, socio-economic barriers, location, prior learning, and the availability of timely academic assistance.

These factors require country-specific evidence. They should not be inferred directly from a PISA or TIMSS score.

Equity examined beside average performance

A national average can coexist with substantial differences between schools or groups. Performance and distribution should therefore be examined together.

PISA provides measures related to socio-economic fairness and inclusion, while UNESCO UIS offers broader indicators related to access, participation, completion, and proficiency. 

Implementation capacity and continuity

Education reforms usually involve curriculum development, teacher preparation, resources, administration, monitoring, and adjustment.

A policy may be reasonable in principle but difficult to implement consistently when timelines, staffing, funding, or accountability arrangements are unclear. This is an implementation consideration, not an explanation that can be inferred from an international score.

Evidence used for diagnosis

International rankings attract attention, but the underlying evidence is more useful when it helps systems identify questions.

A careful review examines proficiency levels, subgroup differences, participation, regional variation, student experience, and changes over time rather than relying only on the headline mean score.

What Other Countries Can Learn—Without Copying

Other jurisdictions can study the principles and implementation questions behind a policy, but unchanged replication does not guarantee the same result.

1. Define the local problem

Identify whether the issue concerns access, achievement, equity, teaching capacity, curriculum, assessment, progression, student belonging, or another outcome.

A vague target such as “become like Singapore” does not define the population, problem, or measure of success.

2. Identify the underlying principle

Separate the visible form of a policy from the principle it is intended to serve.

A teacher-development programme may reflect professional collaboration. Additional learner support may reflect early intervention. An assessment reform may aim to align evaluation more closely with curriculum goals.

The principle may be transferable even when the original programme design is not.

3. Check local conditions

Governance, language, geography, teacher supply, school capacity, funding, technology access, assessment systems, and public expectations can affect implementation.

An approach developed for a compact system may require substantial modification in a large, federal, multilingual, or resource-constrained jurisdiction.

4. Pilot and evaluate

Where appropriate, test an adapted approach on a limited scale and establish success criteria before implementation.

Evaluation should consider more than average test performance. Participation, accessibility, equity, teacher workload, feasibility, and student experience may also matter.

5. Revise before wider implementation

A pilot should inform a decision rather than automatically justify expansion.

An approach should be adjusted when evidence, resources, institutional capacity, or local conditions show that the original design is unsuitable. Monitoring should continue after expansion because implementation conditions can change.

The same principle applies to educational technology. Devices or platforms are not educational outcomes by themselves. Collegenp’s article on when technology helps students learn better explains how learning goals, active thinking, feedback, accessibility, and teacher guidance affect the value of technology.

Common Myths About Global Education Rankings

Myth 1: Finland is always number one

Finland remains strong on selected measures, including the OECD’s PISA 2022 equity classification and creative-thinking performance. Current evidence does not identify it as the universal leader. Singapore led the PISA core domains and creative-thinking mean score. 

Myth 2: The highest PISA score proves the strongest entire system

PISA assesses selected competencies among 15-year-olds. It does not assess every age, subject, institution, pathway, or educational purpose.

Myth 3: More spending automatically produces better results

Expenditure is an important system input, but a spending total does not show how resources are distributed, managed, or used.

A responsible comparison must consider purchasing power, system structure, learner needs, resource allocation, implementation, and the outcome being measured. A simple spending-to-score relationship would not establish causation.

Myth 4: Strong universities prove that the school system is superior

University rankings and school-system assessments examine different populations and indicators.

A higher-education reputation measure cannot substitute for evidence about primary and secondary access, learning, equity, participation, or student experience.

Myth 5: A national average describes every learner

National and economy-level averages summarise a distribution. They can conceal differences between regions, schools, language groups, social groups, and individual students.

Average performance should therefore be considered alongside participation and distributional evidence.

Myth 6: A successful policy can be copied unchanged

A policy operates within a particular legal, cultural, financial, demographic, and institutional setting.

Another jurisdiction may study and adapt the underlying principle, but identical implementation does not guarantee the same result.

How Readers Should Use Education-System Comparisons

The relevant measure depends on the reader’s decision.

Reader Questions that matter most
Student or parent What do local schools provide, and how much variation exists within the system?
Teacher or school leader Which curriculum, assessment, support, and professional-learning practices address the local problem?
Researcher or education student What population, year, methodology, sampling rules, and uncertainty apply?
Policymaker Which principle may transfer, and what local conditions affect implementation?
International applicant What do programme quality, admission, costs, language, recognition, and immigration rules show separately from school-system rankings?

Before accepting an education-system ranking, check:

  1. What outcome is being measured?

  2. Which learners or institutions are represented?

  3. Which assessment or dataset is used?

  4. What year does the evidence cover?

  5. Are countries, economies, and benchmarking participants labelled accurately?

  6. Are access and equity considered?

  7. Are sampling cautions visible?

  8. Is the weighting method published?

  9. Does the conclusion exceed what the evidence supports?

  10. Is school-system performance being confused with study-abroad suitability?

This checklist turns a vague ranking into a comparison that readers can evaluate.

What the Evidence Supports

The sources used in this article do not publish one combined winner across every dimension of education.

Singapore provides the strongest current answer for average PISA 2022 performance in mathematics, reading, science, and creative thinking. Japan, Korea, Lithuania, and Chinese Taipei stand out in the OECD’s defined resilience analysis. Finland, Canada*, Ireland*, Macao (China), and other systems add evidence on equity or broader capabilities. TIMSS provides a separate grade-specific view of mathematics and science achievement.

These findings do not support a timeless universal league table, a claim that one country suits every learner, or a policy-copying formula.

The most credible comparison names the measure, assessment, evidence year, population, methodology, and limits of the conclusion.

Sources, Method, and Update Note

The principal factual sources used are:

  • OECD, PISA 2022 Results, Volume I: The State of Learning and Equity in Education

  • OECD, PISA 2022 Results, Volume II: Learning During—and From—Disruption

  • OECD, PISA 2022 Results, Volume III: Creative Minds, Creative Schools

  • OECD, Programme for International Student Assessment

  • IEA, TIMSS 2023 International Results in Mathematics and Science

  • OECD, Education at a Glance 2025

  • UNESCO Institute for Statistics, UIS Data Browser

PISA evidence describes participating 15-year-olds. TIMSS evidence describes participating grade 4 and grade 8 populations. UNESCO UIS and OECD system indicators have separate definitions, geographic coverage, and reference years.

Last reviewed date: 18 July 2026

Education

Frequently Asked Questions

No country has been shown to lead across every educational goal. Singapore is the strongest answer for average performance among participating 15-year-olds in the PISA 2022 core domains and creative-thinking assessment. Other systems stand out for equity, resilience, belonging, access, or grade-specific achievement. 

Singapore ranked first in PISA 2022 mathematics, reading, science, and creative-thinking mean performance. It also recorded the highest estimated average achievement in TIMSS 2023 grade 8 mathematics. This supports leadership on those assessments, not a claim that Singapore leads every aspect of education.

Finland remains strong on specific measures. It was included in the OECD’s highly equitable PISA 2022 group and among the seven highest-performing systems in creative thinking. Those findings do not establish an overall number-one position.

PISA assesses how 15-year-olds apply mathematics, reading, and science knowledge and skills. TIMSS assesses curriculum-related mathematics and science achievement in grades 4 and 8. Their populations, frameworks, and purposes differ, so their results should not be merged into one score.

Under the OECD’s PISA 2022 definition, Canada*, Denmark*, Finland, Hong Kong (China), Ireland, Japan, Korea, Latvia*, Macao (China), and the United Kingdom* met its combined criteria for socio-economic fairness and inclusion. Asterisks indicate sampling cautions.

Rankings use different populations, indicators, evidence years, geographic coverage, and weighting systems. Some focus on school assessments, while others add university reputation, attainment, spending, safety, employment, or public perception. They therefore answer different questions.

Another jurisdiction can study the principles and implementation evidence associated with a policy. Unchanged copying does not account for differences in governance, language, resources, teacher capacity, curriculum, geography, and institutional structure. Adaptation and evaluation are more responsible than assuming the same policy will produce the same result.

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