Take note of places that you see this icon. That represents one of my screencasts. They are audio - video recordings of lectures throughout the year. You will see and hear everything that a student in the room would have. Almost like being there except you can do it in your pajamas (definately something I do NOT want to have to see in class).
Acrobat Reader is needed to view these documents.
Need to play a screencast? VLC Media player.