GifGrabber is useful to create an animated image of a cartoon clip you want to turn into a funny GIF to send to your friends, or a demonstration to teach a relative how to do troubleshoot an OS X issue. There are undoubtedly a thousand other reasons you'd want to create a GIF of whatever's on your Mac's screen.
"In reality, the main value of project-based learning is that it teaches students to ask the right questions. Traditional assignments predefine the information that the students will use. Project-based learning puts students into the position of having to determine what information they need by asking the right questions."