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 ZIM-SCI study guide introduces students to the idea of being a scientist by presenting activities on the difference between use of the five senses and use of equipment to make measurements (part 1), experiments involving use of the senses as well as use of measuring equipment (part 2), and an activity on the diagrammatic treatment of results (part 3). Information to help students understand scientific principles behind the experiments is included. Throughout the unit, students are encouraged to understand that measurements are never perfect, to recognize errors, and to judge how accurate their results might be. Part 1 activities include: using and trusting senses; measuring length, temperature, mass, time, and volume; making a sensitive balance; and calibrating a beaker. Part 2 experiments include mixing different substances; finding a melting point; measuring a pulse rate; and matching sounds. Instructions for presenting experimental results in the form of a histogram are provided in part 3. (JN)