Shmoop!
It's a catchy word and it probably would be better served if it had a listing of everything in chronological order, but your students will find this is a great resource (and another reason why the traditional book is going the way of the Dodo bird! Just enter the item you are looking for and you will get the following: intro, in-depth, timeline (where appropriate), best of the web, citations and test review (which is essentially a nice outline). By the way, when you see the word "beta" above, it just means that it is new and it is still being tested.