Project AIMS (Activities to Integrate Mathematics and Science) has as its purpose the integration of subject matter in grades K-9 on the premise that such integration enriches and makes learning meaningful and holistic. In fact, extensive field testing of the curriculum materials produced by AIMS has confirmed that integration produces the following beneficial results: (1) mathematics becomes more meaningful, hence more useful; (2) science is increasingly studied and understood, with a significant economy of time; (3) there is improved quality of learning and retention; and (4) there is a dramatic increase in students' motivation and involvement. This teaching guide to surface properties of fluids for grades 4-9 contains 23 lessons., each with a instructions page with lists of materials, objectives and procedures, and reproducible worksheets for students. Topics include: (1) "Beginning Experiences"; (2) "Minimum Surfaces"; (3) "More Physical Properties"; (4) "Bubble Life"; and (5) "Bubble Applications." Also included is a glossary, a checklist of science processes and math skills, a list of children's literature which may be used to extend these lessons, a list of materials for the unit, basic soap solution recipes, bubble challenge ideas, a list of "big ideas," a selective bibliography of 23 references, and information on the AIMS project. (CW)