Free university courses
University courses,
lecture by lecture.
Open Semester publishes complete university courses, free, one lecture at a time. Each course runs like a real semester: weekly lectures and recitations, a course book, problem sheets and full worked solutions.
Popular courses
More courses are in preparation.
Each one is a full semester, from the first lecture to the final exam.
For anyone who wants to learn properly
Students following along with their own semester, people returning to a subject years later, and anyone simply curious.
Free, and it stays that way
Nothing is behind a paywall or a sign-up. Your progress is saved in your own browser; this site sets no cookies and tracks no one.
Checked before release
Every calculation on screen is checked against the written solutions. How it is made