Tag: gastrointestinal

  • Modeling the Alimentary Canal

    Modeling the Alimentary Canal

    In this activity, students use string to model the gastrointestinal tract as a scale model.  I’ve noticed that students do have difficulty with the concept of scaling, which is one of the crosscutting concepts listed in the NGSS. The directions give students measurements for a 1/3 scale model, the human alimentary canal is about 9…