About StatsLearn

StatsLearn is a free study site for AP Statistics and introductory college statistics. Everything works without an account: guides that answer the exact question you searched, calculators that show every step instead of just the final number, and draggable interactives for the ideas that are hard to get from static pages, like sampling distributions and influential points.

The site is built on the redesigned five-unit AP Statistics course that takes effect in Fall 2026 (first exam May 2027). Course facts come from the official College Board course and exam description, and every worked example goes through an adversarial accuracy review before it ships: a second reviewer redoes each calculation and hunts for errors. If you find a mistake anyway, it will get fixed; a wrong formula on a statistics site is a bug, not a typo.

StatsLearn is part of the Learn Network, from the maker of EconLearn, a free interactive AP Economics platform that the Colorado Department of Education lists in its economics resource bank. Same idea, new subject: teach through interaction, answer first, free for everyone.

Start with the guides, the calculators, or the AP course overview. Questions or corrections: about the founder.