First off, he created a rectangle on a coordinate plane using the larger board. Under the left end of the blue bands, there is a small symbol composed of a square, triangle and what looks like a drop of water. He touched this so the rectangle filled in and the corners became visible. This is the 9th icon from the left.
Then tap outside the shape and all the markers disappear. If desired the student can calculate area through the use of a calculator which types the numbers on the geoboard. They can also create hand written notes on the face of it.
Now the finished product can have a screen shot taken of it and then sent off to the teacher. This was fun for me learning something new.
Tomorrow I plan to talk about how to use geoboards to help transition from finding the slope using a graph to the equation for finding slope.