Time vs Distance
Susan walked to the park at a constant rate for 1/2 hour, stayed at the park for an hour, and then walked back home at a constant rate for 1 hour. How would this motion be shown on a distance vs. time graph?
Students were having a hard time going from the text to a graph or from a graph to the equivalent text.
So I wrote a Scratch program to help them visualize what was going on.