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

Barbara McClintock

This module profiles the groundbreaking research of biologist Barbara McClintock in the field of genetics. The module describes McClintock’s painstaking process…

Go to module

Term of the day


[noun] A positively charged ion that migrates to the cathode in an electrical cell.

Go to term