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October 5, 2016

CWP Meeting 10-5-16

December 7, 2016

CWP Meeting 12-7-16

February 1, 2017

Special thanks to Peter Bohacek for sharing his direct measurement videos and Pivot Interactives.

Peter Bohacek, co-founder of Pivot Interactives and teacher at Henry Sibley High School, gave a presentation at the February meeting. If you are familiar with the term, 'Direct Measurement Videos,' you may have used or come across some of his videos. They are often shot at high frame rates and include convenient vantage points and onscreen references. These real-world examples are well-researched and accurate. Although great care is made for precision, there is no fudging of any measurements made and unexpected results do pop up. See if your students can understand what is going on, and what questions to ask.

Meeting Links:
Find information on the use of direct measurement videos in your classroom, as well as a teacher and student video library.
Peter is the co-founder of Pivot Interactives. This soon-to-be start-up provides an online collection of videos and curriculum, as well as integrated data-collection and analysis tools.  

YouTube Video

CWP Meeting 2-1-17

April 5, 2017

Attending: Dan Lokken, Tom Davies, Bryan Foster, Dan Hagstrom

Tom shared several applications and teaching strategies related to the Bernoulli Effect. A 'Larry Scheckel' example a heavy cardboard tube cut to the shape of a cesta, or basket, is lined with sandpaper and is used to throw a foam ball (craft store variety) over students heads and demonstrate how a curve-ball is thrown. Fill up a long plastic bag with a single breath, have student competitions to see who can inflate it fastest, or use a hairdryer for a variety of demos. A leaf-blower lifts and holds a large beach ball over a student's head at a surprising angle, and a flexible 'vacuum' hose is used to suck up paper-punch holes from a desk (in the middle of the room), and sprays them everywhere as the open tube is swung overhead.

Bryan shared astronomy labs that demonstrate the effect of greenhouse gases on temperature. Three bottles are used. One has a vinegar and baking soda reaction take place to produce CO2 gas and is capped. The other is ordinary air. Both are placed under a heat lamp together and the temperature is monitored. A third bottle is simply air and is placed outside of the range of the heat lamp. The temperature inside the bottle with extra CO2 is noticeably higher. In another lab, pictures of the moon, the Mars, and the Venus are provided to students. The age of the surfaces is discussed and explored using these images. Two hemispheres are shown for each celestial body for comparison.

CWP Meeting 4-5-17