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Continuously updated · latest Sep 7, 2026

Lessons that are free to use in any classroom, new research, changes to the dataset, and plain-language explainers. Every entry says which subject it belongs to and what you need to know before reading it. Medical information goes stale, so entries are revised when the evidence moves — revised entries show their update date, not just the day they were first published.

All 12 New research 1 Explainers 8 For classrooms 3
Subject Biology 8 Genetics 7 Health 4 Statistics 4 Social studies 2 Chemistry 1 Computer science 1 Ethics 1 Mathematics 1 Physics 1 ×
A dark card reading "your calculation will be wrong. that is the lesson." — the cover for a free classroom genetics lesson on lactase persistence.

Lesson: the milk mutation

BiologyGeneticsStatisticsSocial studies Age 13+ Intermediate

A free genetics lesson on natural selection, with no equipment needed. The class computes a prediction from real allele frequencies, gets a clean answer, and then finds out it is wrong — because the same solution evolved four separate times in the last few thousand years.

Updated Sep 7, 2026 22

The alleles your parents kept still predict your schooling — three million genomes on educational attainment

The Alleles Your Parents Kept Still Predict Your Schooling

GeneticsStatisticsSocial studies Advanced

Three million genomes, 3,952 variants, and a result so strange it changes what the whole field means: the DNA your parents did not pass on still predicts how far you went in school. Here is what the research on studying actually says.

Sep 6, 2026 67