Grade the code.
We’ll do the teaching.
Coding assignments on the GitHub you already use. Distributed, auto-graded on every push, and explained. When a student fails, our AI tells them why. Students start real coding work faster, in the GitHub they already know, with nothing to install.
| Student | Recursion | Intro | Overall |
|---|---|---|---|
| ALada | 85 | 100 | 92% |
| BAbarbara Failed Recursion | Fail 38 | 64 | 51% |
| GRgrace | 91 | 98 | 92% |
| KAkatherine | 96 | Grading | 95% |
A red “Fail” isn’t feedback.
This is.
Most tools show a score. Coder in 90 turns it into teaching. The AI reads the real test output and your course notes, then explains the failure and the fix, with the output shown right beside it, so it’s verifiable, never a black box.
FAILED test_base_case: RecursionError: maximum recursion depth exceeded 1 passed, 4 failed
fib() never reaches its base case, so it calls itself forever. Add if n <= 1: return n before the recursive call. That stops the infinite descent, and the other four tests pass.Publish. Push. Graded.
Three steps on the GitHub you already use. No new IDE for your students, no platform to onboard onto.
Point us at a template repo
One click installs the GitHub App on your org. We generate a private repo per student and add them as collaborators. Nothing to import.
Students code and push
In their own editor or free Codespaces. A GitHub Actions workflow runs your tests on every push, the workflow they’ll use at work.
Scores and explanations land
The cohort gradebook fills automatically. Failing students surface with the reason, and an AI explanation they can act on.
Built for the GitHub
you already use.
Coder in 90 is deliberately leaner than a full managed platform: no new IDE to onboard, no courseware to import. Instructors spend less time on setup, troubleshooting, and manual grading, and students get instant, actionable guidance on every push. If you want a managed cloud IDE with GPU/Jupyter or a big ready-made courseware library, a platform like Codio is the stronger fit, and we’ll happily say so.
Migrate before August 28.
Set up a cohort in minutes, on the GitHub you already use. Instructors start free for 2 weeks, no sales call.