You have two other possibilities:
a. use the glossary: it allows each user to post a definition (this could be the summary you're talking about) and the user can attach images, files or audios to it.
Every student can see the works of the others and evalutate it.
You as teacher can evalutate each posting and the whole.
b. use the netpublishing module, which needs to be extra installed.
It works like a cooperatrive magazine, where the teacher decides the different parts (titles) and each user/student posts his/her contribution. It works fine.