Skip to content
Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

🧩 Challenges · College Algebra

Build it, break it, predict it, or recall it. Pick a challenge and prove you've got it.

You're previewing the Arcade. Log in or create an account and enroll to keep your XP and personal bests.

build a parabola

construct

build a cubic

construct

build a quartic

construct

spot the distribution slip

debug

predict the next term

predict

guess the line

blackbox

build a rational function

construct

build a sinusoid

construct

recall the unit circle

recall

recall trig identities

recall

recall the quadratic toolkit

recall

recall log rules

recall