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 which introduce students to the idea of becoming a scientist. These activities and experiments (which focus on the need both for the five senses and for equipment to make measurements, and on the display of experimental results in graphic format) are designed to help students understand that measurements are never perfect, to recognize errors, and to judge how accurate their results might be. Each section in this guide corresponds to a given section in the student study guide. (JN)