A learning space for science educators and students

Free Award-winning Content
Free Award-winning Content

We create and provide high-quality, accessible, educational content in the science, technology, engineering and mathematics (STEM) disciplines at the introductory undergraduate level.

About us
Next Generation Science Standards
We support NGSS

Our exclusive content integrates science and engineering practices with disciplinary core ideas and cross-cutting concepts in alignment with the Next Generation Science Standards.

About NGSS

Quick Quiz

Homo sapiens is

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Module of the day

History of Earth's Atmosphere II

The composition of Earth’s atmosphere has evolved over time. This module examines how Earth came to be the only planet in…

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Term of the day

Fixity of Species

[noun] An idea popular among 16th and 17th century European zoologists and botanists that reflected Western religion and the story of creation…

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