Live CS50 Lectures

CS50's lectures in Sanders Theatre at Harvard University are open to the public, September 2025 – November 2025. Whether you are (or were!) a student or teacher of any of CS50's courses, or just CS50-curious, you are welcome to attend CS50's lectures in person in Cambridge, Massachusetts, USA. Fall 2025's lectures will become part of CS50x 2026 on edX.

To attend in person, click Check availability to see available dates and times for tickets. Price includes CS50 souvenirs. Email [email protected] for group discounts (e.g., class field trips).

To watch online instead, register at https://cs50.ly/watch.

SCHEDULE

Scratch on Wednesday, September 3, 2025 at 1:30 PM – 4:15 PM EDT

C on Monday, September 8, 2025 at 1:30 PM – 4:15 PM EDT

Arrays on Monday, September 15, 2025 at 1:30 PM – 4:15 PM EDT

Algorithms on Monday, September 22, 2025 at 1:30 PM – 4:15 PM EDT

Memory on Monday, September 29, 2025 at 1:30 PM – 4:15 PM EDT

Data Structures on Monday, October 6, 2025 at 1:30 PM – 4:15 PM EDT

Python on Wednesday, October 8, 2025 at 1:30 PM – 4:15 PM EDT

SQL on Monday, October 20, 2025 at 1:30 PM – 4:15 PM EDT

Artificial Intelligence on Friday, October 24, 2025, at 12:00 PM – 1:00 PM EDT

HTML, CSS, and JavaScript on Monday, November 3, 2025 at 1:30 PM – 4:15 PM EST

Flask on Monday, November 10, 2025 at 1:30 PM – 4:15 PM EST

The End on Monday, November 17, 2025 at 1:30 PM – 4:15 PM EST

CS50 FAIR

Monday December 8, 2025 at 11:00 AM – 3:00 PM EST.

The CS50 Fair is an epic display of CS50 students' final projects. Also in attendance are popcorn, candy, and a raffle with (fabulous) prizes. Let [email protected] if you'd like not only like to attend but also like to present your own CS50x final project at the CS50 Fair! Please note the location of the CS50 Fair is the Northwest Budiling 52 Oxford St, Cambridge, MA 02138.

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