Students construct models of early gas balloons and gliders. In this balloon and glider lesson plan, students create models of early gas balloons and gliders, discover how the forces of lift and drag effect aircraft in flight, and put...

Learners read a series of articles on the increasingly international business of aquaculture. They answer questions and discuss the readings. They, in groups, read further articles and present summaries to the class.

Ninth graders research, analyze, and orally defend an issue related to the use of geologic resources. They defend their position in written form by composing a letter to an appropriate source.