New top story on Hacker News: Ask HN: Which is that site which gives learning path for learning algorithms

Ask HN: Which is that site which gives learning path for learning algorithms
12 by 4444 | 8 comments on Hacker News.
Few days ago I came across one site which gives a nice path and modules by modules progress of learning and practising algorithms. I forget the site name, do you have seen any products like this ?