Think about the many different uses for screencasting--teachers use it to explain tough concepts, then keep that on your website, Schoology, or Google Classroom for students to refer back to when needed. Students can use it for projects and assignments. ESL students can use it for speaking practice or students who convey ideas better through speech may choose it to complete assignments.
My Favorite: Screencastify because it works well on Chromebooks as an extension and is easy to use
Screencastify is a Chrome extension that allows you to record your screen, face, voice and more. You can capture just a tab in your browser or all of your screen activity. You can even insert video of yourself talking on top of your screen recording.
All Jeffco staff and students have premium accounts. Screencastify extension has been pushed to all Jeffco chromebooks. If you are utilizing a different device, you can add the extension via the Chrome Web Store logged in under your Jeffco Google account credentials.