Screencast-O-Matic (SOM) is a free web-based program and similar to video lecturers, accessible at http://screencast-o-matic.com/home. SOM can capture images on students’ desktop, records their voice, and allows them to save the video to share with their classmates on their digital devices. Please watch this YouTube tutorial video on how to start SOM in your computer.
This is a short video I created using SOM.