Start here
⭐ Toolkit
Foundations Toolkit
The four older skills every topic secretly assumes: percentages, substituting into a formula, reading scales, and rounding. If a topic feels impossible, start here.
⭐ Casio
Calculator Skills
The handful of button sequences that come up again and again on a Casio scientific: the Ans trick for loan and savings tables, plus r, the regression line, and compound interest.
Unit 3
Unit 4
Unit 4 check-up
⭐ Diagnostic
The Grand Opening
Open your own venue across all of Unit 4: funding, investments, and the build. It's multiple choice, you can tap "not sure where to start" any time, and at the end it maps exactly what to focus on first.
🔄 Practice
The Vault Heist
Crack six Unit 4 locks. Wrong code? It tells you what went wrong and you try again. Reshuffles every visit, so you can keep coming back for more.