Show of hands: How many parents have had palpitations when a graphing calculator showed up on the seventh-grade back-to-school supply list? Was it just the cost, or was it also the fact that you had no earthly clue what a graphing calculator does or why anyone would need to know such a thing? The good news is that the folks at CCA realize there are major mathematical concepts that have been discovered since you left junior high. They've put together a two-week, mini-crash course, the Parents' Mathematics Institute, for moms and dads of kids in seventh grade and up that covers elementary math concepts, including writing, solving and graphing inequalities, estimating answers and beginning algebra. The bad news is that the course, complete with an introduction to that pesky graphing calculator and separate workshops for kids, took place earlier this month.