This guide provides material for teaching problems with rate and ratio calculations. There has been a traditional and worsening shortfall of student performance on rate and ratio problems which do not apply to other components of the mathematics program. The major problems found with traditional curriculum approaches are: (1) rate and ratio instruction is not begun early enough; (2) rate is not given a concrete representation that captures its essential action; (3) the procedure underlying the essential skill in ratio problems is not articulated in sufficient detail; and (4) the central procedure is not given sufficient massed practice to become dominant in the student's behavior. The teaching materials in this document are specifically designed to overcome these weaknesses. A plausible sequence of 8 stages for the skills involved in ratio and rate problems is outlined. Seventeen detailed lessons that embody the 8 levels constitute the bulk of the material. These lessons consist of a detailed set of teaching notes and student practice examples. Proposed grade level placements of the lessons are suggested. (MP)