TheoRee
two friends · two mispronunciations · one app
Nice to meet you! 🐝
Theo wants to know your name before you begin. Your progress will be saved just for you.
🐝 Theo & Spy — The Story of TheoRee
🔥 0 day streak

Theory feels
different with TheoRee.

Learn theoretical CS the way Theo did — accidentally, joyfully, one small idea at a time. Choose your course below.

Discrete Mathematics
Choose a topic room to enter
Topic Rooms
Combinatorics
Score 80%+ to unlock the next level
Levels
Challenges
Quick Lesson
📖
Before You Begin
A quick refresher — or skip if you're ready
Level 1
🔥 0
30
QUESTION 1 OF 10 Level 1
🎉
Correct!
8
out of 10
Well done!
⭐⭐⭐
✦ +100 XP
✦ TheoRee Academy ✦
🎓
Certificate of Mastery
Congratulations!
You have successfully completed the comprehensive assessment and demonstrated mastery of all topics.
⭐⭐⭐
Theo 🐝
PhD · Founder · TheoRee
Spider 🕷️
"Found nothing suspicious"