This course picks up where CS50x leaves off, going beyond CS50 and diving more deeply into the design and implementation of web apps with HTML5, CSS3, Python, JavaScript (ES6), and SQL using frameworks like Bootstrap, Flask, and React. Topics include database design, scalability, security, and user experience. Through hands-on projects, students learn to create web apps on their own Macs and PCs (outside of CS50 IDE), write and use APIs, create interactive UIs, and leverage cloud services like GitHub and Heroku. By wintersession’s end, students emerge with knowledge and experience in principles, languages, and tools that empower them to design and deploy applications on the Internet, prepared all the more for summer-time and full-time opportunities in tech.

CS50x or prior experience in any programming language.

How to Take this Course

Even if you are not a student at Harvard, you are welcome to “take” this course for free via this OpenCourseWare by working your way through the course’s eleven days of material, including five projects. Ask questions along the way via any of the course’s communities!

How to Teach this Course

If you are a teacher, you are welcome to adopt or adapt these materials for your own course, per the license.