Now, flow is a type of intrinsic motivation, that is, there you do what you're doing primarily because you like what you're doing. If you learn only for external, extrinsic reasons, you will probably forget it as soon as you are no longer forced to remember what you want to do. Nor will you be motivated to learn for its own sake. Whereas if you are intrinsically motivated, you're going to keep learning as you move up and so you are in this lifelong learning mode, which would be the ideal.
3. What kinds of school activities are most (or least) likely to promote flow?
If you think of where kids have most flow in school, it's mostly in extracurricular activities like band, music, athletics, newspaper. In addition, if you look at academic classes, they would report flow especially when they work on team projects. That's the most enjoyable part of school. Next comes working on your own on a project and you can go down and the lowest one [in promoting flow] is listening to a lecture and audio/visual. Anything that involves them, that has goals where they can try to achieve, solve a problem, or do something it's going to be much more likely to produce flow.
Via Nik Peachey, Lou Salza