Comparison of Screencasting Tools | Into the Driver's Seat | Scoop.it
Screencasting is a fast and easy way to capture what is happening on your screen along with your voice or video of you speaking. Teachers can use screencasts to create self-paced lessons for students, tutorials, and supplements to sub plans. Students can use screencasting to tell stories or demonstrate their understanding of a topic or concept. There really are no limitations on screencasting can be used in schools. 

Via Elizabeth E Charles