Here's an engaging unit on erosion for your upper elementary and middle school scientists. Five hands-on activities demonstrate the processes and effects of erosion by wind, chemical reaction, temperature, water, and glacial action. Clear small-group processes and roles are included, as are cross-curricular extensions and materials lists for each activity. Unfortunately, the worksheets and templates for a journal that students are to keep across the span of the entire unit are not available. You can create them on your own; enough guidance is included in the lesson plan.