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

Homo sapiens is

Go to Quiz

Module of the day

Ocean Currents

Ocean currents are responsible for transporting matter and energy across the ocean. They are driven by the wind, Earth’s rotation, and…

Go to module

Term of the day

excited state

[noun] An energy state for an atom in which electrons exist above the minimum or ground state configuration. In general, excited…

Go to term