GeoGebra applets

Where do fractions and decimals live on the number line? This pages shows you how to accurately locate fractions and decimals on a number line.

Teaser and introduction goes here. Sample problem here.

How are the slopes of parallel lines related? If two lines are perpendicular, what can you say about their slopes?

This page uses a Geogebra applet to demonstrate subtracting fractions with the area model.

This page uses Geogebra to demonstrate using an area model to understand adding fractions.