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  • Population Peril

    Book Chapter | October 2008

    Rising air temperatures have changed the extent and timing of sea ice formation in the Arctic, forcing some polar bear populations to go longer each year without food. In this activity, students assume the role of…

  • Population Ecology

    Book Chapter | March 2009

    In this unit, students explore how biotic and abiotic factors affect population growth. They explore the effects of competition on growth of different species of molds. Students have actively growing cultures with which…

  • Population Growth

    Book Chapter | May 2014

    The purpose of this lab is to introduce students to how population size changes over time and to determine ”How Do Changes in the Amount and Nature of the Plant Life Available in an Ecosystem Influence Herbivore…

  • Population Growth

    Book Chapter | July 2015

    The purpose of this lab is to introduce students to the concept of population growth and some of the factors that can affect the size of a population. Specifically, it gives them an opportunity to explore ”What Factors…

  • Cats and Their Impact on Wildlife Populations

    Book Chapter | January 2004

    Could you be harboring a killer in your home? Is it possible that the cute little cat snoozing so angelically on the sofa is one of the major predators of wildlife in the United States? With a U.S. population of 60…

  • Billions of Us: Scale and Population

    Book Chapter | April 2009

    Population is increasingly important as both a scientific and a political subject. The world is getting more crowded. Providing students with the tools to understand population numbers is not only important for their…

  • Predator-Prey Population Size Relationships

    Book Chapter | May 2014

    The purpose of this lab is to introduce students to the concept of a predator-prey population size relationship and to determine ”Which Factors Affect the Stability of a Predator-Prey Population Size Relationship?” The…

  • How Does Climate Change Affect Oyster Populations?

    Journal Article | February 2020

  • Decline in Saltwater Fish Populations (Ecology and Human Impact on the Environment)

    Book Chapter | November 2012

    The purpose of this chapter is to help students understand the factors influencing the survival of organisms in an environment, focusing on the interdependent relationships in an ecosystem. It calls attention to the…

  • Citizen Science: Ecosystems and Eagle Populations

    Journal Article | January 2017

    This column highlights formal and informal science research projects that students can join and contribute to by gathering and sharing data. Soar into systems thinking with the Mid-Winter Bald Eagle Survey.

  • Point of View: The Curvy Road to Student Success in Underserved Populations

    Journal Article | May 2018

    This column shares reflections or thoughtful opinions on issues of broad interest to the community. This issue discusses at-risk students and grade adjustments in STEM classes.

  • Home Connections: Counting Populations

    Journal Article | January 2004

    This activity, designed for students to do at home, introduces the concept of population sampling. Students scatter pasta on a grid and count the number of pieces in three sample boxes.

  • Science 101: If Evolution Is Based on “Survival of the Fittest,” Why Do Diseases Such as Cancer and Alzheimer’s Disease Persist in the Human Population?

    Journal Article | February 2018

    This column provides background science information for elementary teachers. This issue answers the question while discussing genetics and evolution.

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