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

Globally, precipitation far exceeds evaporation.

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Module of the day

The Nitrogen Cycle

This module provides an overview of the nitrogen cycle and the chemical changes that govern the cycle.

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Term of the day

diorite

[noun] An intrusive igneous rock of intermediate composition, often called "salt-and-pepper" rock because of its speckled black and white appearance. The main…

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