PISA, Mathematics, and Science: What the Global Decline Really Means

Across much of the developed world, students are becoming less capable of reasoning mathematically and scientifically.

The numbers suggest something deeper than an educational fluctuation.

They may reflect a broader cognitive transformation of modern society itself.

Over the last decade, international PISA assessments have revealed an increasingly visible trend:

student performance in both mathematics and science has weakened across large parts of the OECD world.

The decline is not perfectly universal.

Some educational systems remain remarkably strong.

But after 2012 — and especially after 2018 — the broader trajectory became difficult to ignore.

And what makes this trend particularly significant is not simply lower scores.

It is what those scores actually measure.

PISA Does Not Primarily Measure Memorization

The OECD Programme for International Student Assessment (PISA) evaluates 15-year-old students every three years.

Unlike traditional school exams, PISA is not designed to reward repetition or rote learning.

Instead, it focuses on the application of knowledge in unfamiliar and realistic situations.

In mathematics, students must:

• interpret quantitative information,
• analyze data,
• reason through problems,
• connect abstract concepts with real situations,
• and use mathematics as a practical language of understanding.

In science, students are asked to:

• evaluate evidence,
• interpret experiments,
• understand scientific reasoning,
• distinguish reliable information from unsupported claims,
• and connect scientific ideas with everyday life.

In other words:

PISA measures whether students can think with knowledge —

not merely remember it.

The Global Trend After 2012

Many OECD countries began showing stagnation or decline in STEM-related performance after 2012.

The trend accelerated further after 2018.

OECD Average Scores

The decline in mathematics has been especially sharp.

The drop recorded between 2018 and 2022 was among the largest in the history of the assessment.

Science performance appears somewhat more stable recently, but still remains below earlier peaks.

Why Mathematics and Science Matter Together

Mathematics and science are deeply interconnected.

Together, they form the foundation of modern STEM literacy.

These abilities influence whether future citizens can:

• interpret data,
• understand technological systems,
• reason logically,
• evaluate evidence,
• adapt to AI-driven environments,
• and navigate increasingly complex societies.

This is no longer a niche educational issue.

Scientific and mathematical literacy now shape:

• economic competitiveness,
• technological adaptation,
• democratic resilience,
• and the ability of societies to respond rationally to uncertainty.

A World Increasingly Built on Quantitative Thinking

Modern life depends more than ever on:

• algorithms,
• probability,
• models,
• scientific evidence,
• statistical reasoning,
• and technological systems.

Artificial intelligence, climate science, biotechnology, epidemiology, financial systems, and digital infrastructure all require populations capable of understanding complexity at least at a basic level.

When mathematical and scientific reasoning weaken simultaneously, societies become more vulnerable to:

• misinformation,
• conspiracy thinking,
• technological dependence,
• and superficial decision-making.

Why Are Scores Falling?

Researchers point to multiple overlapping causes.

There is no single explanation.

But several recurring patterns appear consistently across countries.

1. Digital Overstimulation

Young people increasingly grow up inside environments dominated by:

• notifications,
• fragmented attention,
• multitasking,
• short-form content,
• and permanent digital interruption.

Deep concentration becomes more difficult.

Long-form reasoning weakens.

Mathematics and science, however, require precisely the opposite:

• sustained attention,
• abstraction,
• patience,
• and structured thinking.

2. Declining Reading Habits

Scientific and mathematical reasoning depend heavily on reading comprehension.

Students who struggle to process complex written information often struggle equally with:

• scientific arguments,
• mathematical interpretation,
• problem-solving,
• and evidence evaluation.

Several international studies suggest that voluntary reading among adolescents has declined substantially over time.

3. Conceptual Weakness

Many educational systems remain heavily focused on:

• procedural exercises,
• test preparation,
• and short-term performance.

But PISA rewards:

• transfer,
• abstraction,
• conceptual understanding,
• and reasoning under unfamiliar conditions.

This creates a growing gap between classroom routines and applied thinking.

4. Expanding Educational Inequality

Socioeconomic differences increasingly shape educational outcomes.

Students from weaker educational environments often face:

• fewer intellectual resources,
• lower access to enrichment,
• weaker reading culture,
• and reduced exposure to analytical thinking outside school.

As inequality grows, educational fragmentation deepens.

5. Pandemic Disruption

COVID-19 intensified many existing weaknesses:

• interrupted schooling,
• reduced interaction,
• digital fatigue,
• psychological stress,
• and learning loss.

But one crucial fact remains:

the decline began before the pandemic.

The pandemic accelerated the trend. It did not create it.

Not Every System Is Declining

The global decline is real — but it is not inevitable.

Several educational systems continue to maintain exceptionally strong STEM performance.

Selected High-Performing Systems (2022)

These systems often emphasize:

• strong foundational knowledge,
• analytical discipline,
• conceptual reasoning,
• problem-solving,
• and coherence between theory and application.

Their success suggests that educational decline is not simply the unavoidable consequence of modernity.

The Deeper Question Behind the Numbers

The most important insight from PISA may not concern education alone.

It concerns cognition itself.

Can modern societies still cultivate:

• deep attention,
• abstract reasoning,
• patience,
• analytical thought,
• and scientific understanding inside environments increasingly optimized for distraction?

That may be one of the defining intellectual questions of the twenty-first century.

Beyond Schools

The decline in mathematics and science performance is often discussed as a school problem.

But it may reflect something much broader.

Educational systems do not operate separately from culture.

Reading habits, media environments, digital behavior, attention spans, social inequality, and technological ecosystems all shape how young people think.

PISA may therefore be measuring more than academic performance.

It may be measuring the changing cognitive ecology of modern civilization itself.

The Future of STEM Literacy

The challenge ahead is not simply producing more scientists or engineers.

It is preserving the broader human capacity for:

• logical reasoning,
• evidence-based thinking,
• quantitative understanding,
• and intellectual depth.

Because societies increasingly dependent on advanced technology cannot function sustainably without populations capable of understanding the systems shaping their lives.

And that is why the PISA trends matter far beyond education policy.

They may ultimately reveal how well modern civilization is preparing itself to think.

Published by EisatoponAI

EisatoponAI is an independent intellectual publication exploring mathematics, science, education, AI, paradoxes, and the hidden structures shaping modern society.

Calm, elegant, and deeply curious — designed for readers who want more than information.