 How can you encourage users to generate content?
x3m: 1- Agree with others on paying students to write reviews.2- You need to improve your UI significantly IMO. From your home page it seems that you would prefer users to register before using/contributing to the site, which I think is not a good idea. Your homepage should be immediately useful to the potential users/contributors. for examples you should have a searchbox(with auto-complete feature for the name of universities and courses at least). Or list of most actively discussed courses, etc.