Welcome to Mr. Downing's Advanced Geometry website. You can scroll over the Advanced Geometry tab at at the top of the page or use the links below to navigate around the site.
The preferred calculator for this class is the TI-30XIIS and it looks like the image to the right. It is affordable at a price between $12-$15 and is very functional for this class and classes above. You are more than welcome to purchase a graphing calculator, but it will run you closer to $120. If you go this route, I would suggest the TI-84.