Hi AliTT. Welcome to the forums.
I guess you could search for educational websites, or perhaps sign up to a site like Learnable.com to see how they present courses.
Really, though, the best way to design a site is to look at the content you have, and work out the most logical presentation for that content. This is the best way to design, rather than just jamming your content into a design for some other purpose. It's not hard to add a bit of decoration after that.