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Previous Features

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  • The Rock Cycle and Plate Tectonics

    The Rock Cycle and Plate Tectonics Presentation

    The processes known as the rock cycle and plate tectonics continually recycle and remodel Earth's solid surface, and reshape its oceans and rivers. 

  • Scientific Decision-making

    Scientific Decision-making Resources

    Using examples related to cardiovascular health, the Scientific Decision-making unit helps high school and middle school students learn how to make evidence-based decisions.

  • People and Climate

    People and Climate Lesson

    Students learn about Earth’s major climate types, how climate affects people's lifestyles, and impacts of climate change.

    Grades: 3-5

  • Mass

    Mass Presentation

    Learn the difference between mass and weight.

  • Butterflies in Space

    Butterflies in Space Mission Page

    Follow life cycle of painted lady butterflies on ISS. Grow your own butterflies in class, and compare them to the space butterflies.

    Grades: 3-5 6-8 9-12

  • The Global Carbon Cycle

    The Global Carbon Cycle Presentation

    Join Nancy Moreno, PhD, as she discusses Earth’s atmosphere, climate change, factors that influence the atmosphere, and other topics related to our planet’s carbon cycle. 

  • Legacy of Lost Canyon

    Legacy of Lost Canyon Reading

    Adolescent friends investigate ancient cave ruins, and learn how and why drugs were used to create cave art.

    Grades: 6-8 9-12

  • Measuring and Counting with a Light Microscope

    Measuring and Counting with a Light Microscope Slide Set

    Learn how to calibrate a light microscope for measurement, how to estimate field diameter, and how to count the number of objects in a single field.

  • The Cinnamon Challenge

    The Cinnamon Challenge Hot Topic

    The “Cinnamon Challenge” is a social phenomenon, spread largely through social media, which carries serious risks. Remarkably, people who participate in this “challenge” willingly accept entirely avoidable risk, even though there is no apparent benefit. The rise of the “Cinnamon Challenge” demonstrates how social media can quickly spread a cultural trend among teenagers, comedians, NBA players, and even politicians.

  • Bird Flu, Updated

    Bird Flu, Updated Hot Topic

    Bird flu is once again in the news. Cases of human infection with the H7N9 subtype of influenza A have been reported in China. This subtype of the virus already spreads more easily from birds to humans than H5N1 did, and there is concern that it might adapt to be sustainably transmitted from human to human. This, of course, is the recipe for a pandemic.

  • Ricin: The Chemical and the Threat

    Ricin: The Chemical and the Threat Hot Topic

    Ricin, one of the most poisonous naturally occurring substances, has a long history as a chemical weapon. Since at least World War I, governments have investigated its use on the battlefield. In September 1978, a Bulgarian dissident, Georgi Markov, was assassinated by a pellet of ricin shot into his leg. There also have been multiple incidents of ricin being sent through the mail. Most recently, in April 2013, envelopes containing powdered ricin were sent to President Obama and US Senator, Roger Wicker. Understanding this chemical, how it works, and how it is used can help to minimize its danger.

  • Japanese Earthquake and Tsunamis: Before and After

    Japanese Earthquake and Tsunamis: Before and After Hot Topic

    On March 11, 2011, a 9.0 magnitude earthquake struck northeastern Japan. The earthquake, aftershocks and related tsunamis devastated miles of the Japanese coastline.