We are looking to teach Game Maker again this year. I did some more searching and found:
1. http://gm.destronmedia.com/?page_id=104&did=25 – The Beginers Guide To Game Maker 7.0 Programing
2. http://gm.destronmedia.com/?page_id=104&did=4 – Super Mario example game
3. http://digitalworlds.wordpress.com/2008/03/14/moving-on-with-game-maker-a-maze-game/ – ideas for adding to the example maze game
4. http://www.roencia.com/vidsgamemaker.html – lots of video tutorials for Gamemaker 7, includes code
5. http://www.pageflakes.com/ouseful/22238750 – a great page with lots of ideas for adding features to some common Game Maker examples like the Catch a Clown game, Maze Game and Platform Game