KNowmania is a very cool website which now has an app. You'll want to look at the online site, but if you're looking at flipping and have detailed screencasts, etc, this is a nice site. It is also an interesting app to have children use to create their own screencasts.
"Knowmia Teach is a new free lesson planning and recording tool for teachers. It helps you create short video lessons on any subject and publish them on Knowmia.com so your students and the public can find them. Knowmia Teach makes it easy to bring in visual aids from multiple sources, organize them in steps (like slides in a presentation) an"
This tutorial maker has a nifty groups function ($5 per month) that lets teachers create groups, etc. It is designed and billed as a "flipped classroom" tool to make it easy to record, etc. For teachers who struggle with flipping, this would be a good solution to test. The app is free to try.
This app "records your writing and voice" and sends it to YouTube for you. NOte that I've found that large files from ipads can sometimes be hard to upload to YouTube so Dropbox is important and was recently added to a new version of this. For me, Dropbox Integration is a must-use for any app.
This app does one thing well - you quick draw and record. It saves it to your camera roll and then you take it from there (can upload to dropbox, etc.)
"The app records your voice as you draw to create quick presentations. Doodlecast Pro saves videos to the camera roll making it easy to import them into popular video editors or presentation tools such as iMovie, Keynote, or iBooks Author. Perfect for teachers, students, business"