This Guide provides teacher resource information for working with the Science Curriculum Improvement Study (SCIS) unit Position and Motion. This unit continues the teaching program on space-time relations with the introduction of the idea of the reference frame. Introductory material includes discussions of reference frames, measurement in science, and clues for the teacher. An equipment list is also included. The unit is divided into four parts which are (1) reference frames, (2) polar coordinates, (3) rectangular coordinates, and (4) rolling spheres. Provided for each part are statements of objectives and background information. Each part is divided into several chapters. Provided for each chapter are (1) a brief introduction, (2) a teaching materials list, (3) a discussion of necessary advanced preparation, (4) teaching suggestions for working with the student manual, and (5) a list of optional activities. (RS)