I have made a new project called Fraction Roller: https://scratch.mit.edu/projects/153790703/
It teaches fractions as numbers and has an animation with a rolling wheel that is a fraction.

Here is a video recorded in Scratch that demonstrates the program:
https://youtu.be/NvhOssKchOE

Also works in Phosphorus i.e. w/o Flash:
https://phosphorus.github.io/app.html?id=153790703&turbo=false&full-screen=true

I was inspired by https://www.geogebra.org/m/b3dabM83 by Anders Karlsson, a Swedish math teacher. A later version of his program is https://www.geogebra.org/m/Dcb8TQ4j .

I did write all code from scratch.

I have made a new project called Fraction Plotter: https://scratch.mit.edu/projects/156805132/
The purpose is to teach fractions.

Also works in Phosphorus i.e. w/o Flash:
https://phosphorus.github.io/app.html?id=156805132

I was inspirered by Bråkritaren https://www.geogebra.org/m/PbzcPdyX by Svetlana Yus, a Swedish math teacher.

This is a modification of Fraction Roller https://scratch.mit.edu/projects/153790703/ .