Explain and Send is a free Chrome extension that I have just installed in my browser. The extension allows me to quickly select all or a portion of my screen, draw on it, type on it, and share it. The extension installs in seconds and if you have synchronization enabled (click here to learn how) it will be available to you on all of the computers that you use. After you have created your screen capture you can share it via email, Twitter, or Facebook. You can also save your annotated screen capture to your computer.
Applications for Education
If you’re a regular Chrome user, Explain and Send could be a great extension to have installed. The next time you’re introducing students to a new web tool, create some annotated screen captures for your students to refer to whenever they need them.