
Interactive problem solving that’s effective and fun. Master concepts in Python, programming, algorithms, and beyond.
CS
Math
Data
Science
Over 100,000 5-star app reviews
Interactive lessons in plain English (not syntax) make it easy to get started.
From Python for beginners to advanced algorithms, we start you at the right level and help you make progress, one step at a time.
Instead of focusing on syntax errors, you’ll master core concepts in computer logic before moving to more advanced topics.
We personalize your experience by providing instant, custom feedback as you solve problems and recommending next steps.
Keep on track with engaging lessons, competitive features, and daily encouragement.
All of our courses are crafted by award-winning teachers and professionals from top institutions.
Arithmetic Thinking
Proportional Reasoning
Probability and Chance
Visual Algebra
Solving Equations
Quadratics
Calculus