The science curriculum is new this year for 4th grade in my county. Erosion and weathering was added as a unit. Do you have any great interactive websites or activities that the students get a lot out of? The past units I have been able to include many hands-on and online experiments and I would like to continue to do so with this unit.
This site has animations of weathering and erosion if you click on the images in the concept map. You can also click on "Introduction" to see the webquest from the beginning. It has built in quizzes but may be a lot of reading for 4th graders.
"Magic school bus: Rocks and Rolls" is a great representation of weathering and erosion
Click on "weathering and erosion"- this site has cute "characters" to represent different things
Lab activity for weathering using rocks in a jar