Access our award-winning, free resources for teaching and learning science.

About us

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

Learn More
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.

Learn More

Quick Quiz

Wood is considered a mineral.

Go to Quiz

Module of the day

Gene Expression

Through a look at the devastating Tay-Sachs disease and other hereditary conditions, this module explores the connection between genes and enzymes.…

Go to module

Term of the day

decompose

[verb] To break up into constituent parts by or as if by a chemical process; to rot.

Go to term