In order to get some feedback from users and fellow classmates it's best to build a prototype of the design. Instead of putting a lot of work into the prototype in the beginning, it can sometime be helpful to make a low-fidelity one to show and get feedback. Those comments/suggestions/questions can then be used to make iterations to the design before building more high-fidelity version.

In the following video you can see how the user can go through the collaboration space to get to the textbooks they are using. There they can make comments/notes and look at other peoples comments on the same text.