Reflection: Modeling The Cell Walk (Part 1/3) - Section 5: The Next Step


For this series of lessons, it is important for students to base their model building on the evidence that they derive both from the lecture given in class and their own Internet research.  The organelle model should not only be based on the electromicrograph measured in the Next Step activity, but it should also show the relationships between specific organelles within the skin cell. To help students better understand the relationships between organelles, they first must understand the relative size of the organelles. This is why students measure the dimensions of the organelle using the LoggerPro Measuring Tool. In addition, this exercise gives students a good review in the measure and conversion of nanometers and micrometers.  Because students need to show the interrelationships between organelles, it is important to not only work well with their team, but also work well as a class in the development of the Cell Walk. Symbolism used throughout the Cell Walk needs to be the same. Otherwise, those experiencing the Cell Walk will not have as rich of experience. By working together as a class to determine what supplies students have available, students can ensure that all organelles will accurately represent the accepted model of the organelle. Finally, students need to write their script for their audience. Typically during this assignment, students find it best to write a script that is appropriate for middle schoolers and a script that is appropriate for their peers. While this is not a requirement, students find that they give better presentations if they can adapt their presentation for their audience.

  Ensuring Continuity throughout the Cell Walk
  Modeling: Ensuring Continuity throughout the Cell Walk
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The Cell Walk (Part 1/3)

Unit 10: The Eukaryotic Cell
Lesson 3 of 5

Objective: Students will construct a gym-size model of a skin cell. They will explain how the endomembranous system works and how the organelles work together to keep the cell alive.

Big Idea: It's Alive! Construct a gym-size model of a cell.

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normal epidermis and dermis with intradermal nevus 10x
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