or click any country anytime to highlight their story
←→ step anytime · space play/pause
How to get the best experience
One worksheet, 90 countries and millions of 15-year-olds, told as a story you can drive.
Watch or drive
▶ Play runs the story on its own. space plays and pauses anytime.
←→ or the ‹ › buttons step one beat at a time, including the small highlights inside a chart.
The tabs along the bottom jump straight to any chart.
Follow one country
Hover any dot to light up its whole country and pop its stats: every measure, its percentile, its student mix.
Click a country, or search at the top right, to highlight it through every chart. × on its tag clears it.
On Ranks a highlighted country is traced down every measure.
Read the dots
From Students on, bubbles are sized by student population: one dot is a fixed number of students.
Top performers Middle Low performers. Gold marks the trait a chart is about.
r compares countries, from −1 to +1. Near 0 means no link between countries. It says nothing about students within a country, and correlation is not cause.
Dig into the grid
On All together, hover a circle for its r.
Click a row or column to grow it and compare that measure with everything.
AI by subject sets weekly AI use against all four subjects side by side.