- Measurement and Geometry Tools - From the University of Georgia. Some interactive tools to find area and other measurements.
- Measurement Presentations - Some highly visual presentations on things such as estimating length and capacity.
- Conversion Tool - A free program that converts 650 different units of measurement between each other.
- PBS Mathline - Some excellent activities to show the relevance of measurement. A number of activities offer simulations.
- Design Your Own Bedroom - Students use Internet resources and common software applications to design and maintain their own room.
- Virtual Manipulatives - Utah State's online library of free manipulatives in all grade levels.
- Size Easy - Enter dimensions of an object and get a "real world" comparison visually.
- Universcale - An interactive grid that shows scale from microbes to solar systems. Very engaging.
- Google Sketchup - A free drafting program for creating 3D images.
- Math is Fun - Some interactive demonstrations of measurement theories and activities.
- Metric Scale - A good handout with visuals to describe scale from one extreme to another.