This sub is for specific questions about a specific topic in history. If your homework involves something like that, you could ask about it here (keeping in mind that we won't do your homework for you, only help you do it yourself).
This is not a sub for "tell me everything please" or - as you did here - "give me tips please", sorry.
I'd suggest looking into [Getstudying] (http://www.reddit.com/r/GetStudying) for good general advice.