This column provides ideas and techniques to enhance your science teaching. This month's issue discusses how children think about the small-particle model of matter. What Richard Feynman referred to as the "atomic hypothesis" is perhaps more familiar to us as the small-particle model of matter. In its most basic form, the model states…

The cycle of duplication and division, known as the "cell cycle," is the essential mechanism by which all living organisms reproduce. This activity allows students to develop an understanding of the main events that occur during the typical eukaryotic cell cycle mostly in the process of mitotic phase that divides the duplicated genetic material…

This article discusses how soap bubbles can be used to teach scientific principles such as phases of matter and the reflection of light. The study of soap bubbles addresses the National Science Education Standards for grades 5-8 related to the properties and changes of properties in matter. The exercises suggested here can be flexible in terms of…