Reflection: Staircase of Complexity Nerve Conduction Speed - Section 3: Nerve Stimulus Experiment

 

Analyzing the Nerve of Some People -Student Work Samples, there are a few things that jump out at me. For the group that successfuly calculated the nervce conduction speed (see sample 1 and 3), their results are in the range of what is expected. However, in most cases, the procedures on each sample do not provide very much detail. This is probably a result of the relatively small space and limited time given to perform this test. Also, the use of vocabulary is inconsistent and the goal of the experiment was not certain for several groups. For example, the second group in the sample only determined reaction time and never calculated the nerve conduction speed. 

In the future, I would like to dedicate more time to doing this activity. Because it is open-ended and there are many variables which can be involved, students need more time to work through the process. I will provide more space and time and scaffold the experiment with proper terminology (i.e. nerve conduction speed, stimulus, reaction).

  Staircase of Complexity: Student Work
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Nerve Conduction Speed

Unit 4: Electrostatics and Circuits
Lesson 16 of 16

Objective: Students determine the speed of their nerve impulse, an electrical signal conducted from the stimulus to the brain.

Big Idea: A nerve stimulus is an electrical signal transmitted through sensory neurons at a speed of about 20 m/s.

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