This is a first-grade manual for teachers using SMSG elementary school text materials. For each chapter background information is given; for each section, objectives, vocabulary, materials, suggested procedures, and further activities are listed. Chapter topics include: (1) pre-number experiences; (2) recognizing geometric shapes; (3) building number concept; (4) pre-addition and subtraction experiences; (5) numbers and the number line; (6) comparing geometric shapes; (7) addition and subtraction; (8) place value and numeration; (9) introducing linear measurement; (10) extending addition and subtraction; and (11) previews and extensions. (MP)