Simon Gregg had the idea to use the fraction modeler to show multiplication. For students to draw, I prefer rectangles because they're easier to draw, but students do gravitate to fraction models, so maybe this can be supportive.
Circle Model Fraction comparison:
[url]http://geogebratube.org/student/m694587[/url]
A Rectangle Model multiplication:
[url]http://geogebratube.org/student/m132103[/url]
