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Texas Education Agency

Texas Gateway: Chapter 7: What Causes Changes in Unemployment Over the Long Run

For Students 9th - 10th
By the end of this section, you will be able to do the following: Explain frictional and structural unemployment; Assess relationships between the natural rate of employment and potential real Gross Domestic Product (GDP), productivity,...
eBook
Mathigon

Mathigon: Geometry: Polygons and Polyhedra: Tessellations

For Students 9th - 10th
This lesson focuses on tessellations, a tessellation is a geometric pattern that covers a surface without gaps or overlaps. They can be seen everywhere in nature such as a honeycomb or a tortoise shell.
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Talk Origins Archive

The Origin of Species, Chapter 14

For Students 9th - 10th
The entire text of Charles Darwin's book, The Origin of Species is available on this site. This link is specifically for the chapter that discusses embryology as evidence for evolution.
eBook
Cornell University

Cornell University: Art, Design, and Visual Thinking

For Students 9th - 10th
Use the left-hand toolbar of this site to investigate an online textbook for the language of design. It provides visual examples and explanations of line, form, color, color psychology, texture, balance, proportion and many more...

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