Zoom Meetings

CS50 occasionally holds live lectures (as well as office hours and even quiz shows!) via Zoom that anyone on the internet is welcome to attend, whether taking any of CS50’s courses or not!

For any Zoom meeting you attend, please take care to

  • participate from a quiet office or similar space (and not from a bed, car, hammock, plane, or train), and
  • participate with your camera turned on, using horizontal (not vertical) video.

If unable to accommodate these norms some week, please watch the live stream or recording at youtube.com/cs50 or facebook.com/cs50 instead.


Fall 2022 of CS50 (which will become CS50x 2023 on edX on 1 January 2023) is in progress at Harvard and Yale, and CS50’s lectures are, as always, open to the public online!

Whether you are a CS50x student, a CS50 AP student, a prospective student, a teacher, a parent, or a Harvard alum (or anyone else!), you are cordially invited to attend one or more of Fall 2022’s lectures virtually. (It is not possible to attend physically in person this year.) All you need to attend is a computer or phone.


You’re welcome to attend one, some, or all of the lectures below. At least an hour before each lecture, we’ll email you instructions for how to join the lecture (via Zoom or YouTube). And we’ll also post links below. Space is limited, so please forgive if the Zoom Meeting fills up! (Zoom allows up to 5,000 users to register for meetings but only allows 1,000 to attend.) But you’re welcome to watch live via YouTube instead!

Zoom Week Lecture Date YouTube
  Week 0 Scratch 2022-08-31T13:30:00-04:00/2022-08-31T16:15:00-04:00 Watch
  Week 1 C 2022-09-06T13:30:00-04:00/2022-09-06T16:15:00-04:00 Watch
  Week 2 Arrays 2022-09-12T13:30:00-04:00/2022-09-12T16:15:00-04:00 Watch
  Week 3 Algorithms 2022-09-19T13:30:00-04:00/2022-09-19T16:15:00-04:00 Watch
  Week 4 Memory 2022-09-26T13:30:00-04:00/2022-09-26T16:15:00-04:00 Watch
Launch Week 5 Data Structures 2022-10-03T13:30:00-04:00/2022-10-03T16:15:00-04:00 Watch
Coming Soon Week 6 Python 2022-10-07T10:30:00-04:00/2022-10-07T13:15:00-04:00 Watch
Coming Soon TBD* TBD 2022-10-17T13:30:00-04:00/2022-10-17T16:15:00-04:00 Coming Soon
Coming Soon Week 7 SQL 2022-10-24T13:30:00-04:00/2022-10-24T16:15:00-04:00 Watch
Coming Soon Week 8 HTML, CSS, JavaScript 2022-10-31T13:30:00-04:00/2022-10-31T16:15:00-04:00 Watch
Coming Soon Family Weekend Cybersecurity 2022-11-04T12:00:00-04:00/2022-11-04T13:15:00-04:00 Watch
Coming Soon Week 9 Flask 2022-11-07T13:30:00-05:00/2022-11-07T16:15:00-05:00 Watch
Coming Soon Week 10 Emoji 2022-11-14T13:30:00-05:00/2022-11-14T16:15:00-05:00 Watch
Coming Soon TBD* TBD 2022-11-21T13:30:00-05:00/2022-11-21T16:15:00-05:00 Coming Soon

* Subject to change.