1 - 12 of 220 results
ATP in Use

This animation shows two examples of how the cell uses energy from ATP. It is the sixth of six animations about cellular respiration.

Pyruvate Dehydrogenase

This animation shows how the pyruvate dehydrogenase enzyme complex converts pyruvate into acetyl-CoA. It is the second of six animations about cellular respiration.


This animation shows how glycolysis converts glucose into pyruvate through a series of enzyme reactions. It is the first of six animations about cellular respiration.

The Immune System

This interactive module introduces the anatomy of the immune system and walks through the timeline of a typical immune response. 

The Hidden Benefits of Distance Learning

What are the benefits of distance learning for students in a high school setting? In this article, two California educators share how they've structured distance learning with their students — including the advantages of their approach.

Lionfish Invasion: Density-Dependent Population Dynamics

In this Click & Learn, students explore mathematical models that describe how populations change over time and apply these models to the invasive lionfish population in the Bahamas. They also use data from other species to learn how density-dependent factors limit population size.