The Zimbabwe Secondary School Science Project (ZIM-SCI) developed student study guides, corresponding teaching guides, and science kits for a low-cost science course which could be taught during the first 2 years of secondary school without the aid of qualified teachers and conventional laboratories. This teaching guide, designed to be read in conjunction with the related student guide, includes instructional strategies, lists of required materials, laboratory procedures, and other information for activities and experiments in a unit dealing with the human senses. Anatomy and physiology of the eyes (sight), tongue (taste), ears (hearing), nose (smell), and skin (feel/touch) are investigated. The study of these individual sense organs is then related to the structure and function of the nervous system. Parts of the brain as well as major nerves are examined during dissection of a rat. The unit concludes with simple experiments designed to establish concepts of reflex action, reflex arc, and voluntary and involuntary actions. Each section in this guide corresponds to a given section in the student study guide. (JN)