Energy is a problem affecting all individuals. To help today's students understand the problem and become realistic decision-makers, materials have been developed by the Sunny Side Up (in Mathematics) program to introduce energy concepts into the mathematics curriculum. Objectives of the program are to: (1) provide highly effective practice in some basic concepts and skills in mathematics, with emphasis on real-life word problems; (2) provide students with skills to conserve natural resources for themselves and future generations; and (3) provide students with energy facts (focusing on solar energy) while increasing mathematical skills. The materials (including puzzles, projects, problems, and various activities) are designed to provide flexibility while fostering such mathematical skills as problem solving, computation with whole and rational numbers, graphing, and meter reading. Unit 1 focuses on whole numbers, fractions, decimals, and percents. Unit 2 contains various energy activities, with mathematical skills needed listed at the beginning of each section. Unit 3 uses energy facts/concepts to foster graphing skills. Unit 4 contains activities designed for independent study and enrichment. (Author/JN)