"openlectures" is open and we lecture ... video online
We are a group of students and former students sharing what knowledge we have.
And we're doing this for free - because we enjoy it.
We believe that effort, not money should decide success. We're dedicated to sharing the knowledge which got us through school with anyone who wants to learn.
If you need revision, a second explanation or just want to learn ahead, is for you. You can search for what you need or go through the curriculum one step at a time, keeping track of your progress with our checkpoint questions.