October 4, 2018
Joule Fellow: Diane Walsh
I had six different stations around the room. In my smaller class, I had groups of two and three students. In my larger classes, I had six groups of four students. The six stations are:
- Force sensor station with the decalcified chicken bones where students measured the force applied (and took a picture with each compression).
- 3-point bend test station where students used given data to create a mathematical model (piecewise-defined function) for the data using Desmos.
- Shin guard station where students brainstormed ideas to build a shin guard and decided who would be what materials to school next week to build the shin guard.
- Young’s Modulus station where students solved word problems related to YM, stress, and strain.
- Stereognosis station where students sorted foam samples by stiffness, first by touch only and then using sight. They also watched a short video about Science of Materials.
- Candy-Matching station where students pulled apart a Kit Kat, Milky Way, marshmallow, and gummy worm and matched the candy name to the corresponding stress-strain graph. They also watched a short video with examples of this activity using similar British candy.
- (next class) I have five laptops available for students to analyze the force sensor images using ImageJ to determine the displacement of the sample under compression.
Lesson pics 1
- Students are compressing a de-calcified chicken bone section using a force sensor and collecting force-displacement data.
- Same but with a piece of foam inside the core.
- Students pull apart candy and match the stress-strain graphs to the corresponding candy name. In this picture, a student is stretching a marshmallow.
- A student is sorting foam samples (some are plain, others with a cutout, and others are composite samples) by touch only from softest to stiffest.
Lesson pics 2
- A student is sorting foam samples while being able to see the samples and comparing the results to the ones gathered using touch only.
- A student is using a rubber mallet and a leather punch tool to make a sponge core for a chicken bone composite sample.
- Hints for the station where students were solving Young’s Modulus, stress, and strain word problems.
Lesson pics 3
- Same as described in the first set.
- Students are using Desmos to analyze force-displacement data of a 3-point bend test on a chicken bone. Students were given the data. They are modeling the data using a piecewise-defined function with a linear component at the start and are running the regression to determine if the ductile region is best modeled by a quadratic or a cubic function.
- Students are using ImageJ to analyze the data collected from the force sensor on the decalcified chicken bones.