My amazing student teacher did an intro lesson for our geometry unit using a book called The Very Greedy Triangle. She made these awesome shape shifters for the students so they could make the shapes as she went through the story.
She got the lesson idea from the Clutterfree Classroom. Then we worked on vocabulary and had some geometry math stations.
My kids loved the geoboard app (and I loved having less rubber bands flying). They also played a game by the Clutterfree Classroom called the Polygon Trail at the teacher station and then wrote shape attributes at another station. It was a really awesome lesson and the kids loved it! Today we started the Polygons with Personality lesson and I can't wait to see how it turns out. You should really check out clutterfreeclassroom.blogspot.com for more geometry lessons and products.