We have multiple documents that need to be signed by all parents & I have some questions.

I'm trying to figure out how to make Dropbox work for our school. 

We have multiple documents that need to be signed by all parents. For example, we have 6 documents that need to be signed by both mom and dad for each student. 

Here are my questions:

1. How can we send multiple documents to multiple recipients but get different signatures on each?

2. Is there a way to keep student docs together but to get 2 different signatures on each? Or does each parent need their own set of documents?

3. Does Dropbox automatically confirm the signature (i.e. not allow the user to continue unless it is signed)?