The app teaches how to sketch in 2D and 3D, which are important skills in math, science, and engineering. Draw the shapes in the sketching assignments and see if your sketch is correct. Hints are available if you get stuck.
Freehand sketching skills are important for spatial visualization, creativity, and teamwork. Learning these skills increases GPA and retention in college. This app has been use in a first year engineering course at UC San Diego, with enthusiastic student response. The app is also suitable for pre-engineering courses in high school.