Host algorithm quizzes and live coding challenges, watch answers land in real time, and debrief the exact concepts your class missed, with AI assistance you control.
17s
What is the main advantage of a linked list over an array?
Waiting for answers...
Your classroom
Students join with a code. No accounts required to play, no setup homework for you.
Live sessions
Concept checks and live coding questions in one session, with a class leaderboard.
Host a session17s
What is the main advantage of a linked list over an array?
Waiting for answers...
AI you control
You decide what Rena can do. Students get nudges, not answers.
See Pro pricingHint-only Rena
Students get conceptual hints, never code snippets or full solutions.
Where Rena appears
Tap to preview →Hints only
No full code
Teacher transcript
Progress
Per-student progress and concept-level gaps after every session.
View progress toolsConcept coverage
DP is the next office-hours focus.
Who needs help
21
active
78%
on pace
Question variants
Variant generation keeps eyes on their own screen without proctoring theater.
Ask us about variantsInstructor settings
Topic pool
arrays, graphs, DP
Difficulty
medium
Similarity cap
18%
AI lineage
measured
Student variants
Same concept, different instance. Copy-paste stops being a strategy.
Classroom pricing
We never paywall question types. Paid tiers add class size, quality-of-life, and AI features: Rena hints for students on Classroom Pro, AI question generation on Ultimate.
Author and host every question type, from multiple choice to live coding.
Rena hints for students, bigger classes, and quality-of-life tools for weekly sessions.
AI question generation, scale, and priority support for departments.
How we compare
Game-show quiz tools are fun but stop at multiple choice. Coding-education tools teach real code but aren't built for a live, competitive classroom. AlgoArena does both.
AlgoArena |  Quizizz |  Gimkit |  Kahoot |  Replit EDU |  Codecademy | |
|---|---|---|---|---|---|---|
| Live in-class coding quizzes | Partial | Partial | Partial | |||
| Students write & run REAL code | ||||||
| CS / DSA-specific content | Partial | Partial | Partial | |||
| Host controls + live leaderboard | ||||||
| Post-session debrief & analytics | Partial | Partial | Partial | Partial | ||
| AI tutor | Pro | Partial | Partial | |||
| Free tier |
Get started
Set up a classroom, pick your question types, and run a live session your students will actually talk about. Every question type is free.