HOW TO USE DROPBOX
These are instructions for your PC however, whether you download to a Mac or PC the criteria is fairly self explanatory. Click the four arrows in the bottom right hand corner to make this slide share full screen.
HOW TO USE ITUNES U ON YOUR COMPUTER
This is a slide show that explains how to use iTunes U (University) on your computer. The screenshots are outdated but the instructions are correct.
HOW TO USE ITUNES U ON THE IPAD
This video moves fairly quickly, however, it gives you a brief overview of how to use the course books in iTunes U.