Detailed lesson plans are provided in this teacher's guide for the SMSG text materials for grade 2. Included are chapters on sets and numbers (review), addition and subtraction (review), sets of points, addition and subtraction (extension), linear measurement, computing sums and differences, congruence of angles and triangles, arrays and multiplication, and division and rational numbers. Mathematical background, objectives, vocabulary, and materials are presented, followed by suggested discussion questions and activities. Answers for worksheets are also included. (MS)