So simple, and yet...

How do you show a .jpg (picture) file in class?  No clue.  But if you need a workable, highly inellegant solution, here it is:

Create a PowerPoint or Keynote blank slide with the .jpg inserted and then display it using either Keynote or VGA Expedition on the iPad and your external monitor.

Duh, sound is all or nothing!

The first time I played a video in the classroom, I kept hearing beeps randomly and unexpectedly which really seemed to be disruptive.  I kept scanning the room for a facebooking or tweeting student who is not paying attention only to realize that the sound was coming from my iPad.  Duh, incoming email beeps!!!  Needless to say that if you plan on showing videos and using anything with AUDIO in the classroom, disable the sound notification setting for your mail and spare yourself the embarassment.