CS50

Hello, world! ‪@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 ‪@edXOnline‬.

To attend in person, visit cs50.ly/attend.

To watch online instead, register at 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

2 months ago | [YT] | 1,306



@pranav945

“I think you all realise This is not a concert, this a computer science lecture." ~DJM

1 month ago (edited) | 41

@t4laal

That's so exciting! I just finished the online CS50x course last month. I'd love to attend the lectures in person, but since I'm in Pakistan, I'll be watching online just like before! Even though the lecture topics are familiar, I always learn something new from Sir David. He's so cool. ❤️❤️

2 months ago | 21

@π42069

Just finished CS50 a few weeks ago can't wait to check this one out

1 month ago | 5

@sasamprensa1449

God bless you all We all love you and will always support you 💌

1 month ago | 0

@federicolaico7052

love this. back to school for cs50 😀😀

1 month ago | 1

@FarijiBadesire

Waouh, the Nobel price is yours😂 we’re not giving it to the president anymore, I’ll be there

2 months ago | 20

@Tryhellojs

may I know if it is the same CS50x lecture like which was uploaded in the YouTube channel of cs50 or is it a new concept or I have one more question like when will this year's python and artificial intelligence course start like I can watch from YouTube since I am from India love you David sir

1 month ago | 0

@OMN2034

If I get a certificate for the 2025 session, will it benefit me or should I wait for the 2026 certificate?

1 month ago | 1

@aosamasaad4451

Anything new in this course? or is it the same as before?

1 month ago | 0

@robertocolon5811

C is so difficult to learn but WORTH IT!!

1 month ago | 0

@UditKumarAgrahari

But cs50 2025 is already published ig??

1 month ago | 0

@lsik231l

How about the hackathon? That would be a blast to attend. Stay up late for some iHop pancakes 🥞

2 months ago | 1

@ABOAMIN-m2v

❤️❤️

2 months ago | 0

@Jeusia

Counter Strike 50?

1 month ago | 0

@ParthPariwandhJU27

Wow ♥️🗣

1 month ago | 0

@tysoncheah

This image makes me sweating

1 month ago | 0

@technofeeliak

Your Discord is being run by crazy women. I gave a hello on the intro channel, said I was working on my video game projects. Someone asked me there what I was working on. I wasn't sure at first how to answer, but I chose the "general" channel to respond in and I wrote "NES and SNES". Right away I got called out for misusing the platform. Now, someone else started an open conversation into the void, and they did the smart thing and just deleted their comment as soon as they were shot down. But I'm tired of being attacked for my humanity and normal social interactions. I got banned. So, I'll use your videos if I see fit. But from my perspective you don't encourage people to thrive. See, having skills is one thing. Being very skillful does not guarantee success. Because it's the social interactions that lead to business arrangements. Make that part of your world view, or teach your students to be silent in isolation not to upset her/she/they/them nutjobs.

2 months ago | 4

@PokemonFanclubSTUDIO

Pls come to india

1 month ago | 0