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  • 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.

  • Iron Bar

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about atoms. The probe is specifically designed to determine whether students can use the idea of atoms to explain why a metal expands when heated.…

  • 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…

  • Warming Water

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about thermal energy. The probe is designed to find out whether students think cold things can have energy.

  • Standing On One Foot

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about weight and pressure. The probe is designed to determine whether students think their weight changes when the force exerted per unit area (pressure…

  • Magnets in Water

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about magnetism. The probe is specifically designed to determine whether students believe air is necessary for magnets to work.

  • Is It a Model?

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about models. The probe is designed to find out whether students recognize that models can take a variety of forms besides physical replicas.

  • Is It a System?

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about systems. The probe is designed to find out whether students can recognize that things with parts that interact or influence each other are systems.

  • Is It Food?

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about food. The probe is designed to find out if students use a scientific definition of food to distinguish food items from nonfood items.

  • Biological Evolution

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about biological evolution. The probe is designed to find out if students distinguish the theory of biological evolution from ideas about the origin of…

  • 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.

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