This downloadable document contains thirty science concept working papers. Each provides a short discussion of the concept, sample test questions, and instructional objectives. Concepts are useful for organizing our understanding, for explaining things, and in developing scientific literacy as the challenge of identifying what is of most worth in science education is faced. Concepts included are: cause-effect, change, conservation, cycle, God designer/sustainer, energy-matter, entropy, equilibrium, field, force, fundamental entities, gradient, interaction, invariance, model, order, organism, origins, perception, population, probability, quantification, replication, scale, significance, space-time, symmetry, system, theory, and validation. NOTE: The large file may take several minutes to download.