New iPad app from Adobe seems to combine the best of a lot of different apps - internal image search like Haiku Deck, record audio on pictures like Speaking Photo, plus even more.
Not only does BaiBoard allow students to collaborate on a shared whiteboard via their iPads, but they can also jointly annotate PDFs. Much like with AirSketch, BaiBoard also includes the ability to do a web share. This means that when on the same network, and with the unique URL associated with the iPad, ANY device can see a student working on their BaiBoard through a browser.
I have been teaching for over 10 years in a variety of contexts. Most recently, I left my position as Director of Academic Technology at St. Michael's Country Day School and joined EdTechTeacher as their Senior Associate.