I decided to explore Snagit because it's free, works on both Macs and PCs, and integrates seamlessly with Google Classroom. Everything captured with Snagit automatically saves to your Google Drive which makes it a breeze to use in Google Classroom.
i started by reading a blogpost entitled Snagit for Chrome and Google Classroom. Next I downloaded the TechSmith Snagit Extension and watched 2 videos about Assigning Snagit for Chrome Captures in Google Classroom and Assigning Snagit for Chrome Screencasts in Google Classroom.
Finally, I created a Screencast for a project I am doing with my 4th-grade library students using Storybird.com.