This document provides an overview of screencasting and instructions for using the screencasting tool Screencast-o-Matic. It defines a screencast as a video recording of one's computer screen that can include narration, making it ideal for creating tutorials. Several screencasting tools are listed, including Screencast-o-Matic, which is then described in more detail. A five-step process for using Screencast-o-Matic is outlined, covering creating an account, starting a recording, publishing the recording, and viewing or sharing the finished screencast.