Math Says Yes

Statistics keeps being right when instinct says no. Put 23 people in a room and the odds that two share a birthday are about 50%. Math Says Yes collects facts like that and walks through the reasoning until each one makes sense.

The format is a scrollable feed of cards. Most cards ask a quick question before revealing the answer, so learners commit to a guess first. That guess is where the surprise comes from, and the retention too. Explanations are short, written in plain language, and every fact cites its source. Many include an interactive chart or slider so students can change the numbers and watch the result move.

Also inside:

• A daily five-question challenge that scores intuition against the odds
• Topics and search covering probability, averages, randomness, and sampling
• A glossary for the vocabulary that normally sends students to a textbook
• Saved cards and a way to mark what's been learned

Reading is free and needs no account. Students sign in only to sync progress across devices or keep a streak going.

In class it works as a lesson starter: put a fact on the board, let students vote on the answer, then walk through the demo together. The data-literacy facts (misleading charts, survivorship bias) also slot into media-literacy units.