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  • Army Ants and Their Guests

    Journal Article |

  • The War Over Water Continues

    Journal Article |

    Debates over water allocation help students understand Earth systems.

  • Is It Made of Parts?

    Lesson Plan |

    The purpose of this assessment probe is to elicit children’s developing ideas about structure in living systems. The probe is designed to find out if students recognize that living things are made up of parts.

  • Chicken Eggs

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about food, transformation of matter, growth and development, conservation of mass, and systems. The concepts underlying this probe are complex. It is…

  • Sugar Water

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about dissolving. The probe is designed to find out what students think happens to sugar when it dissolves in water.

  • Burning Paper

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about conservation of matter during combustion. The probe is designed to find out if students think the mass changes as paper burns inside a closed…

  • Nails in a Jar

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about conservation of matter during a chemical change (oxidation). The probe is designed to find out if students think the mass changes as rust forms…

  • Salt Crystals

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about crystalline solids. The probe is specifically designed to determine how students think atoms are arranged and move in a crystalline lattice.

  • Ice Water

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about temperature in the context of phases of matter. The probe is designed to find out if students recognize that the temperature of a substance does…

  • Chicken Eggs

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about food, transformation of matter, growth and development, conservation of mass, and systems. The concepts underlying this probe are complex. It is…

  • Adaptation

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about biological adaptation. The probe is designed to find out if students think animals intentionally adapt to a change in their environment.

  • Digestive System

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about the digestive system. The probe is designed to find out whether students realize a main function of the digestive system is to break food down into…

  • Global Warming

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about global warming. The probe is designed to find out what students think contributes to global warming.

  • Where Does Oil Come From?

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about an important fossil fuel used by humans. The probe is designed to reveal how students trace oil back to its original source of material.

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