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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.

  • Needs of Seeds

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about seeds. The probe is designed to find out what students think most seeds need to germinate.

  • Will It Form a New Substance?

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about chemical change. The probe is designed to find out how students determine whether a new substance with a different chemical makeup is formed when…

  • Essential Laboratory Safety Signage

    Blog Post |

  • Lab Safety and the 'Dirty Dozen'

    Blog Post |

  • Methanol Use in School Science Labs: Danger, Will Robinson!

    Blog Post |

  • Needs of Seeds

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about seeds. The probe is designed to find out what students think most seeds need to germinate.

  • Making Sound

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about sound. The probe is designed to reveal whether students recognize that sound is produced by vibrating matter.

  • Lemonade

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about conservation of matter. The probe is designed to reveal whether students think matter is conserved when a substance is dissolved in a liquid.

  • Comparing Cubes

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about properties of matter. The probe is designed to find out which properties students think will change if the size of an object made from the same…

  • Floating Logs

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about floating and sinking. The probe is designed to find out if students think changing the size of an object affects how it floats.

  • Is It Food for Plants?

    Lesson Plan |

    The purpose of this assessment probe is to elicit students’ ideas about the product of photosynthesis. The probe is designed to reveal (1) whether students recognize that the food a plant makes is the food it uses and (…

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