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This activity explores images of tree growth in the Serengeti over time, which serve as a phenomenon for learning about and modeling species interactions in ecosystems.

This case study follows a 2020 COVID-19 outbreak on a cruise ship to highlight how control measures like lockdown impact disease spread.

In this activity, students investigate the phenomenon of lactase persistence by making sense of a series of data sets.

In this activity, students identify the science practices and concepts in a Wild Hope episode.

This case study follows the 2019 measles epidemic in Samoa to highlight how vaccination impacts disease spread.

In this activity, wildfires and how much area they burn serve as a phenomenon to guide student inquiry, which includes evaluating data and developing scientific claims.

This activity guides the analysis of a published scientific figure from a study that explored inbreeding depression in a small, isolated population of wolves.

DNA is all around us — even in the air we breathe. Now scientists have found that air quality monitoring stations — which pull in air to test for pollution — also pick up lots of DNA that can reveal what plants and animals have been in the area.

This activity explores an image of a wildlife overpass crossing a major highway, which serves as a phenomenon for learning about habitat fragmentation and conservation.

Scientists who tracked humpback whales in Australia noticed that fewer whales wailed to find mates as their population grew.

Scientists have uncovered new clues about a curious fossil site in Nevada, a graveyard for dozens of giant marine reptiles.

Scientists discovered the oldest known DNA and used it to reveal what life was like 2 million years ago in the northern tip of Greenland.