This is the app Alan was telling us about for annotating books students are reading for your class. Where they can add questions, respond to your questions and respond to each other.
Marco Torres is an amazing teacher, filmmaker, presenter. This is a page of resources from Marco. This could be very helpful for anyone interested in having students do presentations (not just iMovie and video) Love to talk to anyone about it and how we could apply his ideas.
If you are using Google Chrome, this is a great extension to add. It allows you to both do a screen capture and/or a screencasting (capture in video mode what you are doing on your computer when on Google Chrome).