Make it visible

Math Open Reference is a site that offers teachers animated and interactive drawings that show geometry terms and concepts. It is a good visual that can be pulled up on a projector and manipulated to give specific examples. It is also more precise than a hand drawn demonstration or something done on a Geoboard. This would be a great teacher resource. The site is clear and easy to use. However, the colors and graphics are not necessarily the most exciting so it would be up to the teacher to add any excitement or engaging aspects to the instruction.