This teacher's guide is the ninth in a set of 20 activity booklets for teaching mathematics to children in grades 1-8. The 20-level curriculum embodies carefully delineated areas of learning arranged in progressive stages, eliminating grade restrictions and permitting continuous growth according to the individual's ability and rate of learning. The activities are designed to be motivating and enjoyable and reflect the instructional philosophy of moving a student from the concrete experience through the abstract application of mathematics concepts and skills. The level nine booklet contains activities and teaching suggestions for numeration, whole numbers, fractions, measurement, organizing and interpreting data (graphs, charts, and tables), geometry, and problem solving. (JW)