
An introduction to how compound interest works and why it grows savings and loans faster than simple interest. Good for anyone curious about the maths behind saving, borrowing or investing.

An introduction to conditional probability and Bayes' theorem, showing how to update a belief when new evidence arrives. Written for anyone comfortable with basic percentages who wants to see why intuition about tests and probabilities is so often wrong.

An interactive walkthrough that shows you exactly how Froga rooms work — all six block types, one at a time. Complete it, earn your first points, and start your streak!