Postcard Professor aims to take complex ideas and boil them down to the size of a postcard. Typically, this means a video clip with about 10-12 minutes of explanation and writing. The end product can be used as a reference sheet for homework problems.
I'm a professor at Abilene Christian University, and a strong believer that examples and lectures are more useful in video format, so that students can pause, think, rewind, and watch again. I'm making these for the classes I'm teaching, but I hope that they'll be useful to engineers around the world.