"Rocks & Weathering is a great animated site produced by the BBC. The site using interactive animations to teach students all about rocks. The site illustrates and explains how sedimentary, igneous, and metamorphic rocks form. In each stage of the site, students can "create" rocks and "inspect" rocks with a virtual magnifying glass. Students "create" rocks by compacting sediment or by adding water to cool lava. After creating rocks, students can then "destroy" rocks by adding elements of weather." Richard Byrne