A screencast is a digital video and audio recording of what occurs on a computer screen. The presenter records all the screen activity and audio can be recorded simultaneously, or afterwards in postproduction. They are an easy to use multimedia alternative to video recording. 

Screencasts are an effective learning resource. Any instructional activity performed on a computer screen can be recorded. They are an effecient means of describing a step-by-step process, explaining a concept or presenting a PowerPoint presentation with narration. They can be watched by students at anytime, anywhere and at their own pace giving them more control over their learning experience. 

For a more detailed explanation, examples of how to use screencasting for teaching and further information on available software, please click HERE.