This curriculum guide is the third (Series III) in a six-volume set that comprises the Sea Week Curriculum Series developed in Alaska. The book lends itself to the second-grade level but can be adapted to preschool, secondary, and adult education. Ten units contain 77 activities with worksheets that cover the following topics: (1) introduction to mollusks; (2) bivalves; (3) univalves; (4) chitons; (5) cephalopoda; (6) seashell field trip; (7) mollusks to insects: water invertebrates; (8) freshwater insects; (9) freshwater field trip; and (10) field trip follow-up and review activities. An introduction provides information designed to help teachers become familiar with the contents of the curriculum guide and to assist in planning. Each unit contains information on student objectives, and activity background, vocabulary, materials, and procedure. Activities engage students in interdisciplinary projects that involve the skills of classifying, identifying, comparing, computing, measuring, game playing, role playing, writing, communicating, imagining, observing, recording data, and investigating. An annotated bibliography contains 132 resources. A packet of teacher reproducible worksheet masters accompanies the curriculum guide. (LZ)