MGTutoring.com. A Rational Perspective on Education.

April 22, 2009

Dishonesty: Recognized Policy in Education

Filed under: Education — Administrator @ 2:51 pm

How can teachers do their job when they are forced to assign relatively high grades for failing, incompetent work? To make a statement about what a student has done, which statement does not reflect and recognize reality, is dishonest. It is a lie. (I have known some cases where a teacher upped a student’s grade to motivate a smart student to work harder — but that is for a smart student who is having some outside trouble affecting his/her grades. This is rare and should be left to a teacher’s judgment.)

But they moral burden and guilt is on those who force the teachers to do so, not so much on the teachers.

In “Senate backs elimination of ‘no-fail’ grading” in the Dallas Morning News (Tuesday, April 21, 2009), Terrence Stutz writes:

AUSTIN – School districts could no longer require minimum grades for failing students under truth-in-grading legislation that the Senate unanimously approved Monday.

Sen. Jane Nelson, R-Flower Mound, says that students ‘live up or down’ to the expectations that are set for them.

The measure by Sen. Jane Nelson, R-Flower Mound, would prohibit districts from forcing teachers to assign a minimum grade to failing students regardless of their class work and test scores – a practice that has been growing in recent years.

Both the Dallas and Fort Worth districts have minimum grades of 50, although at least one Dallas high school goes even further and does not allow a grade lower than 70.

Under the bill, which now goes to the House, local school officials also would have to adopt a grading policy directing teachers to issue grades that reflect student mastery of subjects they take.

I’ll be surprised if the bill passes. But even more surprised if it is enforced. Even then, there are many ways around it, I’m sure.

And how are students to learn the importance of thinking when they learn the corrupt, errant lesson that reality does not matter? How can students learn to recognize signals of failure when the signals are removed? Why not go on to teach them to get drunk when they are hurt or out of work, so as to evade the issue and evade the signals of failure? — As if an injury will go away if they are not conscious of it; as if bills, the need for groceries, the need for shelter, will go away if they are not conscious of it; as if reality will go away.

But with lessons they learn, they don’t need to get drunk. Evasion becomes built into their minds.

Some ideas are worse than drugs.

April 18, 2009

Supplanting Saxon

Filed under: Education,Mathematics,Recommended Books — Administrator @ 4:14 pm

Keedy and Bittinger’s algebra texts do a better job of presenting algebra than Saxon.

K&B give better explanations and integrations of mathematical concepts and methods — and hence are more focused on theory than Saxon. K&B provide much better and many more “applications” of the math and provide more exercises to drive a concept/method home — and they give you the freedom to do ten exercises or so, and come back to the section every week for five or ten more exercises so that you can maintain and build fluency throughout the year; whereas Saxon forces you to follow their pedagogy.

Update (11-6-09, 10 AM): Corrected a misspelling: flueny to fluency.

April 17, 2009

On Saxon Math

Filed under: Education,Mathematics,Recommended Books — Administrator @ 9:41 pm

I’d recommend against Saxon. It’s a big mistake; I don’t know how anyone would want to use it.

It does have some (attempted) virtues: it focuses on the math, casting out the irrelevancies; it gives the student long-term practice of math concepts and methods; it presents things in bit-sized pieces.

But in their attempt to present math in bit-sized pieces, they shatter the whole of math into fragments. I could not possibly teach from Saxon books. Impossible. I would not be able to delve into an idea as it is natural to do, and as reason demands. (Only a good teacher would have the judgment to navigate the book…if the teacher was forced to use it; and the book would of necessity have to be supplemented.)

And when about two to four exercises are given for idea A, followed by about two more per section until idea A is built upon — sometimes 50 or 100 pages later! — students are not allowed to grasp and master a concept as they should, to see it in its full variety, and to carry out a critical aspect of reasoning: integrating a concept into the whole of one’s knowledge.

But Saxon “works?” Yes, it accomplishes a little — but at what price? And what is it missing out on? It leaves a lot to be desired — which I’ll address some other day.

Saxon: Don’t do it. (Unless they improve their methods some day…which is possible…but which would require a big change in the Saxon approach…)

April 14, 2009

Quote: Gottfried Leibniz

Filed under: Quotes — Administrator @ 2:09 pm

“Music is the pleasure the human soul experiences from counting without being aware that it is counting.”

(But I have not verified this one, i.e., found its source/citation.)

April 13, 2009

The Birthday Problem

Filed under: Mathematics — Administrator @ 1:18 pm

After discussing the solution to the Birthday Problem, someone at Queen’s University in Cananda says:

The more people there are in a group, the higher the chances of any two people having a birthday match. The probability is:

70% for 30 people
90% for 41 people
95% for 47 people
over 99% for 57 people.

Dr. Math also discusses how to solve the birthday problem.

Dr. Reese of the Mathematics, Science, and Technology Education program at the University of Illinois at Urbana-Champagne allows you to run your own simulation.

April 12, 2009

“The Dream Of Man” by William Watson

Filed under: Art — Administrator @ 2:52 pm

To the eye and the ear of the Dreamer
This Dream out of darkness flew,
Through the horn or the ivory portal,
But he wist not which of the two.

It was the Human Spirit,
Of all men’s souls the Soul,
Man the unwearied climber,
That climbed to the unknown goal.
And up the steps of the ages,
The difficult steep ascent,
Man the unwearied climber
Pauseless and dauntless went.
AEons rolled behind him
With thunder of far retreat,
And still as he strove he conquered
And laid his foes at his feet.
Inimical powers of nature,
Tempest and flood and fire,
The spleen of fickle seasons
That loved to baulk his desire,
The breath of hostile climates,
The ravage of blight and dearth,
The old unrest that vexes
The heart of the moody earth,
The genii swift and radiant
Sabreing heaven with flame,
He, with a keener weapon,
The sword of his wit, overcame.
Disease and her ravening offspring,
Pain with the thousand teeth,
He drave into night primeval,
The nethermost worlds beneath,
Till the Lord of Death, the undying,
Ev’n Asrael the King,
No more with Furies for heralds
Came armed with scourge and sting,
But gentle of voice and of visage,
By calm Age ushered and led,
A guest, serenely featured,
Entering, woke no dread.
And, as the rolling aeons
Retreated with pomp of sound,
Man’s spirit, grown too lordly
For this mean orb to bound,
By arts in his youth undreamed of
His terrene fetters broke,
With enterprise ethereal
Spurning the natal yoke,
And, stung with divine ambition,
And fired with a glorious greed,
He annexed the stars and the planets
And peopled them with his seed.

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April 11, 2009

San Jacinto Day — April 25th

Filed under: Announcements,History — Administrator @ 1:18 pm

Posted on TAFFIE-Announce:

Event: San Jacinto Day Festival and Battle Re-enactment
Date: April 25, 2009
Location: La Porte (Houston)
San Jacinto Battleground State Historic Site
3523 Battleground Road, LaPorte TX 77571

Celebrate the battle that won Texas’ independence in 1836. This event offers a full day of live music and entertainment, children’s activities, living history camps, craft demonstrations, food vendors and much more. In the afternoon, hundreds of historical re-enactors gather at the San Jacinto Battleground to stage the state’s largest battle re-enactment. Free to the public. 10 a.m.-6 p.m. For more information, visit http://www.sanjacinto-museum.org/

April 10, 2009

On the Radio

Filed under: Americana,Art — Administrator @ 1:47 pm

Nick’s Classic Jazz, on Live365.com, is a good station. They play jazz from the 20s through the 50s. I’m listening to Etta James as I write…

Update (6:14 PM): Now they are playing “Mr. Sandman” by the Andrews Sisters. Wow…I’m feeling very “Back to the Future”…

A Thought

Filed under: Education — Administrator @ 1:43 pm

Mastery your memory or be slave to your subconscious.

Update (6:18 PM):  It’s fascinating seeing what Mrs. Rand said about memory and the subconscious in discussing a concept she called “psycho-epistemology.” An excerpt:

The subconscious is an integrating mechanism. Man’s conscious mind observes and establishes connections among his experiences; the subconscious integrates the connections and makes them become automatic. For example, the skill of walking is acquired, after many faltering attempts, by the automatization of countless connections controlling muscular movements; once he learns to walk, a child needs no conscious awareness of such problems as posture, balance, length of step, etc.—the mere decision to walk brings the integrated total into his control.

A mind’s cognitive development involves a continual process of automatization. For example, you cannot perceive a table as an infant perceives it—as a mysterious object with four legs. You

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April 9, 2009

Thinking About Health

Filed under: Exercise, Health & Nutrition,Science — Administrator @ 2:25 pm

Dr. Michael Eades has a very interesting recent post entitled “More braying from Bray.” It will teach you what you need to know to make yourself healthier, but it is also a good read in reasoning and doing science.

Dr. Eades says such things as:

After giving short shrift to [Gary Taubes'] hypothesis of obesity, Dr. Bray then goes on to lay out in great detail his own theory of obesity as represented by the Rube Goldbergesque diagram at the top of this post.  Bray’s entire hypothesis, for which he recruits leptin, insulin, the brain, glucocorticoids, and God knows what else to help make his point, is based on a faulty premise.  But it’s a faulty premise that he has accepted uncritically.

His hypothetical model of obesity, he authoritatively states

starts with the First Law of Thermodynamics, which states that the change of energy in a closed system is the difference between the heat added to the system and the work done by the system.

Dr. Bray then restates this hypothesis (and the First Law) in the form of this equation:

Δ E = Heat (q) – Work (w)

Readers of this blog know this as the energy balance equation, which looks like this in its more familiar form:

Δ Weight (the Δ means change) = Energy in (food) – Energy out (exercise plus metabolism)

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