http://www.sciplus.com/. This is a science and surplus store. Cool stuff, great prices, and the shipping is reasonable. I put in an order the other day for a math sampler kit. It includes a geoboard and rubber bands, a tangram with assorted geometric shapes, fraction bars, dice, both blank and traditional, a protractor, a safety compass, measuring cup, a blank re-usable spinner, and a couple of other math thingies, all for 4.75. Just last week I bought Elliott just the geoboard at the local school supply store, and it was 4.25 all on it's own. There are lots of other terrific things there, but this was my latest deal!