I follow this site off of Facebook. They do great things here and I have found many solutions and ideas in what is posted. Below is a recent post:
This is a guest post from Tom Daccord (@thomasdaccord) of EdTechTeacher, an advertiser on this site. Thanks to a recent partnership with Khan Academy, Duck Duck Moose has made its terrific Draw and Tell iOS app completely FREE. With Draw and Tell, young students can easily create an animated screencast complete with voice, drawings, images, and objects.