Thank you for your reply.
I think the question(s) I wanted to ask, after experimenting today, was how do I save the information on "page 1/tab 1", while creating new pages/tabs; because yesterday the data on page 1 would disappear after I created a new tab? I don't know what I did today, but the information was saved somehow, and there was no problem with any information disappearing on any of the pages...
My next question is do I have to use Dropbox, or can I just store all the information I need for my classroom use one my iPad? At the moment I don't know what our district's policy is about sending out information through 3rd party servers, and I don't want to take that risk until I know what their official position is. I would like to just keep everything secure on my iPad.
Again, thank you for your informative and speedy responses!