SCENARIO 1: Mr. Roberts has been assigned a class of primary students with autism. Seven-year-old Gary does not seem to be catching on to the concept of addition. Mr. Roberts wants to determine which of two approaches to the teaching of addition would be potentially most effective to use with Gary. The two approaches are: (1) use of "counting sets", and (2) use of a number line. Design the graph to show an alternating treatments approach. You will need to make up data showing the percent correct on a curriculum-based measurement for addition for each of the treatments so that you can create a graph to display the baseline & alternating treatments