I saw this activity at a science conference years ago and haven't had a chance to use it in a classroom until this week (mainly because I didn't teach weathering, erosion, and deposition). It is a great way to reinforce the definition of the weathering, erosion, and deposition in a highly kinesthetic manner. Basically you break the students up into groups of three. One group is "Weathering" another group is "Erosion" and the third group is "Deposition". Add tape to the back because you are going to stick them to the forehead of the children in each group. The "weathering" students get a sheet of paper that is their "rock" they will be breaking down. At the start of the activity the "weathering" students will start ripping tiny pieces of their "rock" and handing it to the "erosion" students. The "erosion" students will be running their tiny piece of "rock...
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If you cut and paste this website into your tool bar you can watch a short video. http://www.google.com/sites/help/intl/en/overview.html
Below the video you can see a classroom sample.
I haven't done much playing around, other then to start sharing files, but plan to soon.
Eve
By the way, the last page in your starter pages file, says science contact. I assumed you meant contract.
Eve
Hope things are going well for you in school.
Eve