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

The amplitude of a wave is a measure of its

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Module of the day

Taxonomy II

Carolus Linnaeus, the “father of taxonomy,” developed a uniform system for naming plants and animals to ensure that each species has…

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Term of the day


[noun] A stable isotope of hydrogen (written 2H) that contains one neutron in its nucleus and has a natural abundance of 0.015%.

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