Lesson Plan
Willow Tree

Interior Angles, Exterior Angles, and Diagonals of Polygons

For Students 8th - 11th Standards
How does the number of sides of a polygon affect the angle measures? Learners recognize a pattern in finding the total measure of interior and exterior angles and the number of diagonals. They use the patterns to calculate...
Lesson Plan
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Maryland Department of Education

The Concept of Diversity in World Literature Lesson 8: Nonfiction Close Reading

For Teachers 10th - 11th Standards
As part of their study of Things Fall Apart, class members conduct a close reading of a section of Chinua Achebe's essay, "An Image of Africa: Racism in Conrad's Heart of Darkness." Jigsaw groups then compare the voice in the essay...
Handout
International Technology Education Association

Telescope as Time Machine

For Teachers 9th - 10th
This resource provides an explanation of NASA's GALEX mission and how the space-based telescope can view distant galaxies as they were billions of years ago. The resource also discusses the other aspects of galaxies that GALEX...
Lesson Plan
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Center for Learning in Action

Density

For Teachers 2nd - 5th Standards
Explore the concept of density within states of matter—gases, liquids, and solids—through a group experiment in which young scientists test objects' texture, color, weight, size, and ability to sink or float.