1) Open your TeacherKit app and they should offer you StudentCallout as a Christmas gift. If not, you can find it here: https://itunes.apple.com/us/app/student-callout-by-teacherkit/id944696774?mt=8
2) When you want to use the StudentCallout, you click on the die that is located at the top middle right of the screen.
So there you have it: StudentCallout, a relatively new app that integrates with TeacherKit and helps you to randomly pick students. While it’s not a “must-have” app, I have been having a lot of fun with it. Try it out and let me know what you think.