This is Spring 2026 of CS50 (aka CSCI E-50) at Harvard Extension School.

This was CS50

Harvard Extension School
Spring 2026

CS50.ai
Ed Discussion
Gradescope
Visual Studio Code

Week 0 Scratch
Week 1 C
Week 2 Arrays
Week 3 Algorithms
Week 4 Memory
Week 5 Data Structures
Week 6 Python
Week 7 SQL
Week 8 HTML, CSS, JavaScript
Week 9 Flask
Week 10 Artificial Intelligence
Week 11 The End

Announcements
FAQs
Final Project
Office Hours
Problem Sets
Quizzes
Sections
Seminars
Staff
Syllabus
Test

CS50 Manual Pages
CS50 Status Page

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Congratulations on finishing CS50! 🎉

Visitas 2026