Concept: Adding, subtracting, multiplying, and/or dividing decimals. Each group will choose one of the following topics and create a video to help others learn about math. Plus each group must include an estimation strategy. I encourage your group to be creative, use props, and plan your video including all members. View rubric below : http://www.rcampus.com/rubricshowc.cfm?code=W98547&sp=yes