JAN AND BOB DAVIDSON are the founders of the Davidson Institute for Talent Development,a nonprofit foundation that provides assistance to gifted children and to schools.They are the founders and former chief executives of Davidson & Associates, the educational software company that published “Math Blaster™.” They live in Incline Village, Nevada.  More . . .
	LAURA VANDERKAM is a freelance writer who writes regularly for the op-ed page of USA Today, and is a member of the paper’s Board of Contributors. She lives in New York City.