Screencastify - Record your screen
Head to the Chrome Web Store to grab this extension. If you would like your students to respond to learning content with video, this tool may be the solution for you.
Or, if you wish to make YouTube videos, then this may be the fit for you as well.
This software requires some training. It is not an intuitive software to start off with. I recommend that you watch the training video to get familiar with it.
You can download the FREE SOFTWARE HERE.