Developed for mathematics-shy high school chemistry students, this laboratory manual is suitable for use with any chemistry textbook. Seventy-three experiments, based on a theme of change, are grouped into 5 general areas: (1) 9 experiments focusing on skills needed in observing reality; (2) 19 experiments interpreting how reality changes, including properties of matter, physical and chemical changes, reaction rates, and catalysts; (3) 11 experiments indicating how models are used to categorize and quantify change; (4) 24 ecochemistry experiments designed to form a model of a changing universe, including such activities as testing water samples, identification of metallic ions, and analysis of materials found in plant tissues; and (5) 10 nutrition/organic/biochemistry experiments to illustrate that change also affects students' collective everyday lives, including consumer food tests for butter, margarine, caffein, synthetic dyes, and citric acid in fruit juices, and the preparation of common organic compounds. (JN)