In the third lesson of the Digital Logic series, students solve the problem of selecting the ideal cat for Kat to take to Hogwarts.

The video should be paused at these points to allow students to work:
4:46, 5:15, 8:20, 8:52, 9:22, 9:39, 10:10, 10:48, 11:05, 11:27, 12:00, 17:11, 17:42

There are a lot of pauses, so each one is marked with a chime and a "pause" symbol at the lower right of the screen.  The pause symbol is just a marker.  To actually pause the video, you must use the pause button in the video controls.