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description=Autograded coding assignments on the GitHub you already use. Distributed, graded on every push, and explained. A leaner, GitHub-native alternative to Codio. Students always free; instructors start with a 2-week trial.;

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coder in 90 classroom the github classroom replacement skip to main content coder in90 home how it works pricing blog login github classroom shuts down aug 28 2026 migrate your course before the fall term the github classroom replacement 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 start free as an instructor see how it works free for students instructors start free for 2 weeks runs on your github org check auto graded on every push coder 90 classroom fall 2026 bootcamp completion 83 pass rate 87 check in 2 avg 84 student recursion intro overall al ada 85 100 92 ba barbara failed recursion fail 38 64 51 gr grace 91 98 92 ka katherine 96 grading 95 5 hrs a week back from manual grading 0 students never pay ¼ the per student cost of a managed platform 0 lock in it s just github repos the difference 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 most autograders a score and analytics that flag frustration ai quiz tools generated questions not failure explanations coder in 90 explains the failure and the fix barbara recursion lab scored 38 100 autograder output failed test_base_case recursionerror maximum recursion depth exceeded 1 passed 4 failed ai explanation your 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 how it works publish push graded three steps on the github you already use no new ide for your students no platform to onboard onto 01 publish 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 02 push 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 03 graded scores and explanations land the cohort gradebook fills automatically failing students surface with the reason and an ai explanation they can act on where we fit 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 see how we compare to codio 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 start free as an instructor book a 15 min migration call coder in90 product how it works pricing cli blog legal privacy terms refund policy contact hello coderin90 com 2026 coder in 90 all rights reserved we use cookies to improve your experience and for analytics see our privacy policy reject accept