William Flannery

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Recent Posts by William

Fri Dec 01, 2017 7:36 PM in High school physics without a textbook ?
My kid is taking physics in the 9th grade and there is no text.  The teacher begins the class with a meditation period, and then lectures and the students take notes. This seems slightly ridiculous to me.  I think a high school physics class needs a textbook.   Is it a new thing in teaching?  Is there some rationale for it?

Wed Aug 16, 2017 1:53 PM in A challenge for STEM educators, what did Newton do?
Modern science, technology, engineering, and math began when an apple fell on Newton's head (?) at his country estate, and he determined to describe its trajectory.  That is, to find its position at each instant as it falls, that is, to find a function p(t) that gives the apple's position as it falls. I don't believe any high school math or physics teacher can describe what Newton did to determ...

Fri Sep 04, 2015 11:59 AM in How to revolutionize physics education in hi school
Physics is to a large extent applied differential equations. And that's a problem. Newton wanted to understand the movement of objects in the sky, he discovered gravity, F = C/r^2, it could have been a lucky guess, he discovered the 2nd law of motion, F=MA, so far no problems. He combined them to get a differential equation A=D/r^2 Enter calculus. Unfortunately A=D/r^2 has no analytic so...