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

Density is defined as

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Module of the day

Waves and Wave Motion

Waves have been of interest to philosophers and scientists alike for thousands of years. This module introduces the history of wave…

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Term of the day

core

[noun] The innermost layer of the Earth, which starts at ~2900 km depth. The core is composed mainly of iron and consists…

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