Macromedia's web animation program, Flash, is one of the most versatile tools available in the IMAGE lab. You can use it to make everything from buttons and interactive graphics to web-movies and even games. Of course, with such versatility and power comes a complexity unparalleled by the other Macromedia programs.
NOTE: The best way to start learning a new program is to follow the tutorial supplied by the program's makers. Feel free to use the instruction manual for the program (ask the lab assistant for it if you can't find it) and follow the tutorial inside.
For a cursory overview of Flash's features and a short guide to using the program, peruse the pages below.
Of course, the pages above are just an overview of the program. Here are some more resources you might want to look over.