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

Earth's magnetic field is constant.

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Module of the day

Chemical Reactions

This modules explores the variety of chemical reactions by grouping them into general types. We look at synthesis, decomposition, single replacement,…

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Term of the day


[noun] A substance that speeds up the rate of a chemical reaction but that is not used up in the process.

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