Screencast-O-Matic

By recording their screens, Screencast-O-Matic enables teachers to provide their students with scaffolding through visual materials. The recordings can be easily converted to video format, which can be shared with students. Screencast-O-Matic is mainly a screen recording tool for computer use, but is also available as a mobile application. The tool is easy to use, and provides a free version as well as a premium version with more features.

Screencast-o-matics Youtube channel contains tutorials and an introduction video.