Here is one of the home work you can find in our book (Sine Curve Animation).

It is useful for students, elementary or more. Even some university students need this to visualize the curve.
In this homework, what you can do is try to find a way to draw a sine curve using flash. Make a XY [...]

Here is one of the home work you can find in our book. It is called triangle animation.
It is useful for elementary students. You can download the source from Homework Page
In this homework, all you have to do is to make an animation that calculate and visualize the triangle area and surrounding length.