This is part two of a two-part SMSG text for grade seven students whose mathematical talents are underdeveloped. The reading level of this text has been adjusted downward, chapters shortened, and additional concrete examples included. Nevertheless, the authors warn that the text may not be appropriate for the very slow non-college-bound student. Chapter topics include: rational numbers and fractions, non-metric geometry, rational numbers and the number line, decimals, and ratio and percent. (MN)