> You might want to consider Tangible Math: Probability Constructor >designed by LOGAL Software Inc. and carried by SUNBURST. It was developed >for grades 8-college. The description reads, "Using a variety of modeling >tolls such as coins, marbles, color wheels, dice, random numbers, areas, >and animation, students build models to visualize the concepts, formulas, >and relationships related to probability. Experiment results can be >analyzed using build-in tools such as bar charts, spreadsheets, Venn >diagrams, trees, or graphs. > The student activities that accompany Probability Constructor introduce >the concepts of frequency and relative frequency, then build a >comprehensive understanding of probability. Students apply these concepts >to a variety of situations, including intersections of events, unions of >events, complementary events, and mutually exclusive events. This prepared >curriculum is just a start, however. Probability Constructo is an >open-ended learning tool teachers and students will use often to model >probability situations."