Describes an approach to teaching animal classification by applying a scientific examination of the types and arrangement of the teeth. This approach may be used by high school students. (HM)

Describes an inexpensive technique for providing student opportunities to observe and identify the variety of small animals living in the first few inches below the surface of the soil. A classification key to some small soil animals is also presented. (HM)

Describes the construction and use of a shell-discovery kit for students to employ in actively investigating the natural world. (WRM)