[fontkodo]

Happens every 4 months. Intro to Computer Science
It has deadlines, quizzes, assignments, etc.

No previous knowledge expected.

Here's the link.

 

[exia]

And if you already know how to program, but you just want to practice: Train with Programming Challenges/Kata | Codewars

Also, a side note, the problems on that site are perfect practice for Software Engineering technical interviews.