From CS50’s entire team, happy holidays! 🎄We'll be back in 2025 with a new-and-improved CS50x, new opportunities to engage, updates to past courses, and some brand-new ones as well. There will also be a few surprises along the way! 🤫

This is CS50x 2025, now available for free at cs50.edx.org and youtube.com/cs50 as well as on Apple TV and Google TV. This year’s release includes new-and-improved lectures and problem sets, fun on-stage demos, and also more in-depth coverage of the more complex topics. Welcome aboard!💡

Check out the interviews with Harvard students about their final CS50 projects — which one’s your favorite? 🧐

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And here are the interviews with Yale students about their final CS50 projects, ranging from a hack-and-slash video game to a task manager, as well as much more… Get inspired to make your own! ✨

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Q: What’s the difference between CS50 Certificates and edX’s Verified Certificates?
A: An edX verified certificate “can provide proof for an employer, school, or other institution that you have successfully completed an online course.” A CS50 Certificate is a free certificate from CS50 itself.

#FAQ50

Rubber snow ducks in the wild. ❄️🦆

 If Bluesky is your platform of choice, good news! 🩵 You can now join CS50 at @cs50.harvard.edu.

Do you know about CS50's Seminars? Led by CS50’s teaching fellows, seminars are opportunities to dive more deeply into topics of interest.

This is a seminar on making small-scale 2D games with LÖVE 2D and Lua, led by CS50's own Guy White! Find other seminars at http://cs50.harvard.edu/x/seminars.

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Q: What’s the difference between CS50x’s “less comfortable” and “more comfortable” problems?
A: Some problem sets (i.e., programming assignments) offer problems for students less comfortable with computing and problems for students more comfortable with computing. Each week, you are welcome to do either or both!

#FAQ50

Something not working? Problem set harder than you expected? Or do you simply want to connect with people from all over the world taking CS50’s courses? The best place for real-time Q&A (with humans!) is CS50’s Discord server at discord.gg/cs50. 👾

If you’ve finished one of CS50’s courses already, let us know your Discord username at cs50.edx.org/alum. We can give you an “alum role” so that when you answer questions, students know you might be able to help!