#7 Comments on opencourses(MIT)-6/5

I have never used open courses before but  I found out that MIT opencourseware is a really useful website which has many kinds of lessons and of course, it is free. Also, there are still many advantages like it will save your watching records and will give you a online certificate after watching a lessons. I think those who want to learn something that the school does not teach can take a good use of this website!