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

Any kind of rock can melt to form magma.

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Module of the day

The Periodic Table of Elements

The modern periodic table is based on Dmitri Mendeleev’s 1896 observations that chemical elements can be grouped according to chemical properties…

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Term of the day

diffusion coefficient

[noun] Developed by Adolf Fick, a mathematical framework stating that the diffusion rate of a substance is proportional to the difference in…

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