I know there are several national or maybe regional companies that offer rewards for good grades--I think some are actually year round, but some might be for the summer only. I found information on a few; can anyone add to this list?

Chuck E. Cheese free tokens:
www.chuckecheese.com/cec2002/restaurants/tokens.html

Blockbuster free kids movie rental:
www.blockbuster.com/bb/about/community/0,4431,,00.html

For each A or equivalent grade a student earns on their final 2002-2003 school year report card, Bowl America (regional company--Washington DC/Richmond areas and parts of Florida) will reward them with a FREE game of bowling