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

Go to Quiz

Module of the day

France Anne-Dominic Córdova

This module profiles the career of astrophysicist France Córdova, director of the National Science Foundation. The module traces Córdova's path from…

Go to module

Term of the day


[noun] A subatomic particle with a negative charge of 1.60 × 10-19 coulombs and a mass of 9.11 × 10-31 kg. Electrons…

Go to term