Math Vocabulary can be difficult for students to remember. I love to find activities that are hands on, engaging and memorable for students. These kinds of activities motivate my students to want to do them over and over which I love to see! This app is FREE and is like a real Geoboard, but with the ability for students to fill in their shapes. Great for learning quadrilaterals or like the below picture of showing congruent shapes and equal parts. This teacher's blog you will go to following the link below will also have some other great tech ideas for the classroom. Enjoy!
http://artofpossibilityforteachers.blogspot.com/2013/02/quadrilateral-project-with-geoboard-app.html.