Jing is free screencasting software that can be used to create tutorials, trainings, and presentations by capturing screenshots and audio narration. It allows teachers to make video tours of student work, PowerPoint presentations, or online content. The document discusses how Jing can be used for educational purposes like tutorials, embedding videos online, and having students narrate their own work, as well as why the author chose Jing because it is easy to use and helps coach peers through simple presentations.