This was CS50x Puzzle Day 2025, a weekend of problem-solving with 12,707 participants from 166 countries. See cs50.medium.com/this-was-cs50x… for the puzzles themselves, solutions thereto, fun facts, and more. Here’s what a few participants had to say: * “A perfect blend of logic,

Check out this #CS50FinalProject by Tina Bruce from Stockholm, Sweden. “BookIt” is a web booking app made with Flask, Python, JavaScript, SQLite, HTML, and CSS. 🏨 youtu.be/_Y-PANaLhqk

Here’s more pictures from Rongxin’s Birthday Lunch! Rongxin is the architect of @CS50's AI-based rubber duck. 🦆

Curious about how iOS apps are made?📱Check out this #CS50seminar led by @CS50’s Teaching Fellow Kamryn Ohly, where she walks you through the basics of iOS development using Xcode and Swift — including how to build your own Buzzfeed-style quiz game! Plus, get a glimpse into using

Q: GitHub has disabled my account. What should I do? A: Best to visit cs50.ly/github in incognito mode (i.e., private mode, so that you're logged out) and contact GitHub directly! #FAQ50

Join us for a Q&A with Professor David J. Malan and @CS50’s own Yuliia Zhukovets this Friday, May 16, at 11:30 AM EDT on CS50’s YouTube. Comment with your most pressing questions below! 👇

Via The New York Times, "Dr. David J. Malan, a computer science professor, has integrated a custom A.I. chatbot into a popular class he teaches on the fundamentals of computer programming. His hundreds of students can turn to it for help with their coding assignments. Dr. Malan has had to

Watch Professor David J. Malan and @CS50’s own Yuliia Zhukovets answer your questions during these Office Hours recorded at the CS50’s office. 🏫 youtu.be/w4dNGeCwgVY

Did you get a free certificate prior and now want to upgrade to a verified one? If so, simply log into your edX account and purchase a verified certificate for that course. After making that purchase, email us your edX purchase receipt to [email protected] with the

Do you know about the @CS50 Manual?📘 A simplified version of C's "man pages" for functions frequently used in CS50. Whether you're just getting started or need a quick reference, it’s here to help. manual.cs50.io

"As a graduating senior, if you asked me about one of my most memorable moments at Harvard University, I would still immediately think of my very first lecture here. It happened to be @CS50 – Introduction to Computer Science...", by Inno '25. college.harvard.edu/student-life/s…

Ever wondered how AI is transforming healthcare? 🩻 In this #CS50seminar, @CS50’s Teaching Fellow Ravi Rajamani introduces you to CXR Foundation, an open-source model from Google Health AI for analyzing chest X-rays. Learn how to run your first inferences, explore real-world use

CS50 is back in the United Kingdom! Join us in London on Friday, June 20, 2025, for a @CS50 Hackathon with the Oxford Continuing Education and Meta, with Professor David J. Malan from Harvard University, Professor Daniel Wilson from Oxford, Professor Tom Crawford from Oxford (and Cambridge University and

Q: Will my real name or username appear on my certificate? A: For CS50 Certificates, we will ask you what name you wish to appear. For edX’s Verified Certificates, the name associated with your edX account will appear on your verified certificate. #FAQ50

Meet Zeyad Belal, from Port Said, Egypt. For his #CS50FinalProject, he built a classic memory card game that challenges players to match pairs using logic and concentration. 🧩 youtu.be/YFEQVEk6XYM

This was the @CS50 Hackathon at Meta in London, with Oxford Continuing Education and Dr Tom Crawford. 🦆 With workshops on AI, Llama, Wearables, and Number Games.

Last month, @CS50’s team got together to say goodbye to Yuliia and Vlad as they prepared for new adventures. For the last two years, Yuliia has been CS50’s preceptor, helping manage CS50 both on campus and off, while Vlad worked on CS50's social media and video production.

This was the first-ever @CS50 Hackathon at Meta in London 🇬🇧, with workshops on AI, Llama, Wearables, and Number Games by CS50’s own David J. Malan and Rongxin Liu, Oxford’s own Dr Tom Crawford, et al. 💻

Last week, we hosted this year's @CS50 Educator Workshop, bringing together teachers from 14 countries to learn how to adopt or adapt CS50 for their own classrooms. 🌎 Over two days, educators explored CS50’s teaching resources, heard from CS50’s own David J. Malan about the