Third-grade math is kicking my butt. I have been trying to keep my granddaughter, Sabria, on track, while she figures the area and perimeter of polygons, and I am nearly blind from counting, measuring and figuring those little suckers on her computer screen. It doesn’t seem to bother Sabria, who figures everything in her head. I figure on paper in order to check her work—she occasionally adds two numbers together wrong. I try to get her to use a pencil and paper, and she will for a little while, just to appease me. I heard a celebrity s