Describes the construction and use of this simple apparatus designed to illustrate the phases of the moon. (BB)

Describes an activity using a large balloon to help children understand that, even though the horizon appears to be flat, the Earth is, indeed, round. Uses a toy ship to reinforce evidence from the first part of the activity. Stresses the importance of confronting naive theories at an early age. (CW)

Uses a demonstration done by John Tyndall in 1856 to show that geological processes can produce striking changes, such as slate formation, by slow and incremental means. Explains how Tyndall's demonstration can be replicated in the classroom using paraffin or beeswax to produce the layering change similar to slate. (CW)

Provides instructions for the construction of a paper mache classroom planetarium and suggests several student activities using this planetarium model. Lists reasons why students have difficulties in transferring classroom instruction in astronomy to the night sky. (DS)

Discussed are the reasons for the changing of the seasons on earth. Included are 27 activities which can be used to teach geography and the seasons. Diagrams of planetary motion and climatographs are presented. (CW)

Presented is a poster and article which details the process of obtaining minerals from the earth and refining them for use. On the reverse is a chart of helpful mineralogy information. A list of four information resources is included. (CW)