This document was developed to provide eighth-grade teachers in New York City with a sequence of instructional activities in science. The major portion of the guide is divided into four instructional units. The first unit, "Chemistry," includes lessons and activities on liquid solutions, suspensions and emulsions, acids, bases, neutralization, and air pollution. Unit II, "Physics," deals with energy, force and work, machines, and density and pressure. Unit III, "Biology," addresses digestion and absorption, circulation, and respiration, excretion, and behavior. The final unit, "Earth Science," pertains to the atmosphere and weather. Each section includes background information for the teacher, objectives, procedures for activities and experiments, homework assignments, and an appendix. The appendices contain test items that could be used to evaluate the effectiveness of the unit. (TW)