Author Archives: jrh794

About jrh794

I am a sixty-five year old math instructor at Southern Oregon University. I taught at the College of the Siskiyous in Weed California for twenty-six years. Prior to that I worked as a computer programmer, carpenter and in various other jobs. I graduated from Rice University in 1967 and have a MS in Operations Research from Stanford. In the past I have hand-built a stone house and taken long solo bicycle tours. Now I ride my mountain bike and play golf for recreation.

Another Way to Solve Quadratic Equations

Here is a recent video on how to solve quadratic equations.  It depends on the fact that the two roots lie symmetrically about the x-coordinate of the vertex.  It eliminates the guessing or systematic trials by using in simpler quadratic … Continue reading

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Do We Really Need Fraction Bars?

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A Year of Nights of Wondering VIII: Stuck Edition

My students have taken their seats and are beginning their daily quiz.  One says, “I’m stuck, Mr. Hatton.”  I murmur something about doing the best she can.  She repeats, “No, I’m stuck.”  I remind her  about the online quiz makeup … Continue reading

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Creativity Conference II – What Inspired Me

I was inspired  by the smart, sensitive and, yes, creative presenters at our second Creativity Conference here at Southern Oregon University.  Last year I listed what I had learned.  This year I will list what stirred me to action. Art, … Continue reading

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Precalculus Essay Test

As something to do while waiting for new advisees at our first summer registration event, I attempted to turn a typical precalculus exam into an essay test – no calculations, just words.  Actually also diagrams.  You can see it at … Continue reading

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Changing the Limits of Integration

It is possible to change the limits of a definite integral to any limits you want by using a linear u-substitution.  To go from the integral from a to b to the integral from a’ to b’, use a u-substitution of u = mx + … Continue reading

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I Love Math – And It Makes Me Glad

I love the game of Go, I love golf, I love my wife, I love teaching, and I love math – and this makes me glad. Eight years ago, I ended that sentence with the word, “sad.”  Eight years of … Continue reading

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