<?xml version="1.0" encoding="UTF-8"?><rss version="2.0"
	xmlns:content="http://purl.org/rss/1.0/modules/content/"
	xmlns:dc="http://purl.org/dc/elements/1.1/"
	xmlns:atom="http://www.w3.org/2005/Atom"
	xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
	
	>
<channel>
	<title>
	Comments on: [PS] Check For Understanding	</title>
	<atom:link href="/2010/ps-check-for-understanding/feed/" rel="self" type="application/rss+xml" />
	<link>/2010/ps-check-for-understanding/</link>
	<description>less helpful</description>
	<lastBuildDate>Sun, 05 Dec 2010 07:11:36 +0000</lastBuildDate>
	<sy:updatePeriod>
	hourly	</sy:updatePeriod>
	<sy:updateFrequency>
	1	</sy:updateFrequency>
	<generator>https://wordpress.org/?v=6.8.2</generator>
	<item>
		<title>
		By: Chris Sears		</title>
		<link>/2010/ps-check-for-understanding/#comment-271409</link>

		<dc:creator><![CDATA[Chris Sears]]></dc:creator>
		<pubDate>Sun, 05 Dec 2010 07:11:36 +0000</pubDate>
		<guid isPermaLink="false">/?p=8638#comment-271409</guid>

					<description><![CDATA[I&#039;ve been thinking about definition 1, and I&#039;m not sure that problems of this type should be called pseudocontext.  

There are factual errors that come from misinformation, like the the color of the stars.  Those can be corrected and the problem can be salvaged.  So, I would not call that pseudocontext.

There are simplifying assumptions that are made in a problem.  Simplifying assumptions are just part of math and science.  Those should be stated at the beginning of the problem.  For example, if you study simple harmonic motion in a trigonometry or calculus class, you use a sine function.  However, that ignores the internal friction of the spring.  By ignoring some details, we can focus on other details.  I wouldn&#039;t call simplifying assumptions pseudocontext.

I do completely agree with definition 2.  Clearly, a problem about adding the temperature of stars is virtually unfixable.  It is not a naturally arising question from the study of stellar bodies.

There is a natural tendency to attempt to pigeonhole every bad word problem as pseudocontext.  To make the term &quot;pseudocontext&quot; useful, it should describe a proper subset of bad word problems.]]></description>
			<content:encoded><![CDATA[<p>I&#8217;ve been thinking about definition 1, and I&#8217;m not sure that problems of this type should be called pseudocontext.  </p>
<p>There are factual errors that come from misinformation, like the the color of the stars.  Those can be corrected and the problem can be salvaged.  So, I would not call that pseudocontext.</p>
<p>There are simplifying assumptions that are made in a problem.  Simplifying assumptions are just part of math and science.  Those should be stated at the beginning of the problem.  For example, if you study simple harmonic motion in a trigonometry or calculus class, you use a sine function.  However, that ignores the internal friction of the spring.  By ignoring some details, we can focus on other details.  I wouldn&#8217;t call simplifying assumptions pseudocontext.</p>
<p>I do completely agree with definition 2.  Clearly, a problem about adding the temperature of stars is virtually unfixable.  It is not a naturally arising question from the study of stellar bodies.</p>
<p>There is a natural tendency to attempt to pigeonhole every bad word problem as pseudocontext.  To make the term &#8220;pseudocontext&#8221; useful, it should describe a proper subset of bad word problems.</p>
]]></content:encoded>
		
			</item>
		<item>
		<title>
		By: Maria Droujkova		</title>
		<link>/2010/ps-check-for-understanding/#comment-271352</link>

		<dc:creator><![CDATA[Maria Droujkova]]></dc:creator>
		<pubDate>Sat, 04 Dec 2010 12:41:16 +0000</pubDate>
		<guid isPermaLink="false">/?p=8638#comment-271352</guid>

					<description><![CDATA[This reminded me to discuss a type of pseudocontext for your taxonomy. You can call it wrong grain size, or wrong level. It is best expressed in the following old joke about oral examinations.

A veterinary student has only studied one topic for the final: fleas. The examiner asks question number one, about dogs. The student answers: &quot;Dogs are mammals covered with fur. In the fur, there are fleas. Fleas are...&quot; The examiner asks question number two, about cats. The student answers: &quot;Cats are mammals who also have fur. In cats&#039; fur, there are fleas. Fleas are...&quot; The examiner, somewhat exasperated, asks about fish. The student says: &quot;Well, fish don&#039;t have fur. But if they did, there would be fleas in it, and fleas are...&quot;

Way too many math questions completely miss the relative importance, coolness, relevance of different features of the context. So-called &quot;storytelling&quot; questions are often especially atrocious.]]></description>
			<content:encoded><![CDATA[<p>This reminded me to discuss a type of pseudocontext for your taxonomy. You can call it wrong grain size, or wrong level. It is best expressed in the following old joke about oral examinations.</p>
<p>A veterinary student has only studied one topic for the final: fleas. The examiner asks question number one, about dogs. The student answers: &#8220;Dogs are mammals covered with fur. In the fur, there are fleas. Fleas are&#8230;&#8221; The examiner asks question number two, about cats. The student answers: &#8220;Cats are mammals who also have fur. In cats&#8217; fur, there are fleas. Fleas are&#8230;&#8221; The examiner, somewhat exasperated, asks about fish. The student says: &#8220;Well, fish don&#8217;t have fur. But if they did, there would be fleas in it, and fleas are&#8230;&#8221;</p>
<p>Way too many math questions completely miss the relative importance, coolness, relevance of different features of the context. So-called &#8220;storytelling&#8221; questions are often especially atrocious.</p>
]]></content:encoded>
		
			</item>
		<item>
		<title>
		By: Jason Dyer		</title>
		<link>/2010/ps-check-for-understanding/#comment-271249</link>

		<dc:creator><![CDATA[Jason Dyer]]></dc:creator>
		<pubDate>Thu, 02 Dec 2010 15:08:11 +0000</pubDate>
		<guid isPermaLink="false">/?p=8638#comment-271249</guid>

					<description><![CDATA[@Brian, just to note the essay is from the mid-60s, before Apollo 13.

Check out the forum for the simulation game &lt;a href=&quot;http://orbit.medphys.ucl.ac.uk/home.php&quot; rel=&quot;nofollow&quot;&gt;Orbiter&lt;/a&gt; sometime. Hardcore: it&#039;s got people trading physics equations to do particular maneuvers.]]></description>
			<content:encoded><![CDATA[<p>@Brian, just to note the essay is from the mid-60s, before Apollo 13.</p>
<p>Check out the forum for the simulation game <a href="http://orbit.medphys.ucl.ac.uk/home.php" rel="nofollow">Orbiter</a> sometime. Hardcore: it&#8217;s got people trading physics equations to do particular maneuvers.</p>
]]></content:encoded>
		
			</item>
		<item>
		<title>
		By: Brian		</title>
		<link>/2010/ps-check-for-understanding/#comment-271199</link>

		<dc:creator><![CDATA[Brian]]></dc:creator>
		<pubDate>Wed, 01 Dec 2010 23:03:08 +0000</pubDate>
		<guid isPermaLink="false">/?p=8638#comment-271199</guid>

					<description><![CDATA[i agree with Josh that it is the 2nd part, but...

i don&#039;t see myself (or anyone else for that matter) ever having to add the temperatures of 2 stars, and i think it&#039;s mildly sad that that was the best example they could come up with. 

how about using &#039;traveling through space&#039; as a context? imagine being at the controls of a spaceship, coming in for a landing. &quot;How much thrust, for what duration &#038; at what power should you give it?&quot;

thinking about Apollo 13, i&#039;m sure some arithmetic was needed to know how much O2 they had left, &#038; how much more they would need to make it home safely...arithmetic is everywhere...]]></description>
			<content:encoded><![CDATA[<p>i agree with Josh that it is the 2nd part, but&#8230;</p>
<p>i don&#8217;t see myself (or anyone else for that matter) ever having to add the temperatures of 2 stars, and i think it&#8217;s mildly sad that that was the best example they could come up with. </p>
<p>how about using &#8216;traveling through space&#8217; as a context? imagine being at the controls of a spaceship, coming in for a landing. &#8220;How much thrust, for what duration &amp; at what power should you give it?&#8221;</p>
<p>thinking about Apollo 13, i&#8217;m sure some arithmetic was needed to know how much O2 they had left, &amp; how much more they would need to make it home safely&#8230;arithmetic is everywhere&#8230;</p>
]]></content:encoded>
		
			</item>
		<item>
		<title>
		By: Michael Paul Goldenberg		</title>
		<link>/2010/ps-check-for-understanding/#comment-270846</link>

		<dc:creator><![CDATA[Michael Paul Goldenberg]]></dc:creator>
		<pubDate>Sun, 28 Nov 2010 05:35:24 +0000</pubDate>
		<guid isPermaLink="false">/?p=8638#comment-270846</guid>

					<description><![CDATA[Well, that&#039;s another point in Tech&#039;s favor. 

As for pseudo-context, I just looked through the text used in first year algebra in Detroit Public Schools and I have a sick headache from all the pseudo-context it contains. I&#039;m struggling to find a germ of a problem that can be crafted into something worthwhile. Maybe after a good night&#039;s sleep. . . and a book burning.]]></description>
			<content:encoded><![CDATA[<p>Well, that&#8217;s another point in Tech&#8217;s favor. </p>
<p>As for pseudo-context, I just looked through the text used in first year algebra in Detroit Public Schools and I have a sick headache from all the pseudo-context it contains. I&#8217;m struggling to find a germ of a problem that can be crafted into something worthwhile. Maybe after a good night&#8217;s sleep. . . and a book burning.</p>
]]></content:encoded>
		
			</item>
		<item>
		<title>
		By: louise		</title>
		<link>/2010/ps-check-for-understanding/#comment-270837</link>

		<dc:creator><![CDATA[louise]]></dc:creator>
		<pubDate>Sun, 28 Nov 2010 02:26:02 +0000</pubDate>
		<guid isPermaLink="false">/?p=8638#comment-270837</guid>

					<description><![CDATA[Michigan Tech sends their applicants a copy of &quot;surely you&#039;re joking.&quot; I thought that automatically made it a good college.]]></description>
			<content:encoded><![CDATA[<p>Michigan Tech sends their applicants a copy of &#8220;surely you&#8217;re joking.&#8221; I thought that automatically made it a good college.</p>
]]></content:encoded>
		
			</item>
		<item>
		<title>
		By: monika hardy		</title>
		<link>/2010/ps-check-for-understanding/#comment-270831</link>

		<dc:creator><![CDATA[monika hardy]]></dc:creator>
		<pubDate>Sun, 28 Nov 2010 01:21:10 +0000</pubDate>
		<guid isPermaLink="false">/?p=8638#comment-270831</guid>

					<description><![CDATA[i love feynman as well.]]></description>
			<content:encoded><![CDATA[<p>i love feynman as well.</p>
]]></content:encoded>
		
			</item>
		<item>
		<title>
		By: Lurker		</title>
		<link>/2010/ps-check-for-understanding/#comment-270823</link>

		<dc:creator><![CDATA[Lurker]]></dc:creator>
		<pubDate>Sat, 27 Nov 2010 23:12:41 +0000</pubDate>
		<guid isPermaLink="false">/?p=8638#comment-270823</guid>

					<description><![CDATA[Wow, you hadn&#039;t read that essay before?  It&#039;s awesome.  It&#039;s just filled with awesome.  You have to read the whole thing through.

There are so many wonderful Feynman essays.  There&#039;s his essay on cargo cult science, his essay on the education system in Brazil (where students are memorizing rather than learning), his essay &quot;What is Science? (he discusses how he learned science from his father), and so many more.  I won&#039;t include the URLs because I don&#039;t want this comment to get marked as spam, but you should be able to find them with Google.

And don&#039;t miss his books, Surely You&#039;re Joking, Mr. Feynman! and What Do You Care What Other People Think?  When I was a young kid who loved science and was frustrated with school, those books were absolutely inspiring, and undoubtedly helped influence me to enter into a career of math and science.  And even if only 30% of the anecdotes in his books were actually true, I don&#039;t care, it&#039;s still both entertaining and inspiring.

Sorry if I sound like a Feynman fanboy.  I guess I am.]]></description>
			<content:encoded><![CDATA[<p>Wow, you hadn&#8217;t read that essay before?  It&#8217;s awesome.  It&#8217;s just filled with awesome.  You have to read the whole thing through.</p>
<p>There are so many wonderful Feynman essays.  There&#8217;s his essay on cargo cult science, his essay on the education system in Brazil (where students are memorizing rather than learning), his essay &#8220;What is Science? (he discusses how he learned science from his father), and so many more.  I won&#8217;t include the URLs because I don&#8217;t want this comment to get marked as spam, but you should be able to find them with Google.</p>
<p>And don&#8217;t miss his books, Surely You&#8217;re Joking, Mr. Feynman! and What Do You Care What Other People Think?  When I was a young kid who loved science and was frustrated with school, those books were absolutely inspiring, and undoubtedly helped influence me to enter into a career of math and science.  And even if only 30% of the anecdotes in his books were actually true, I don&#8217;t care, it&#8217;s still both entertaining and inspiring.</p>
<p>Sorry if I sound like a Feynman fanboy.  I guess I am.</p>
]]></content:encoded>
		
			</item>
		<item>
		<title>
		By: josh g.		</title>
		<link>/2010/ps-check-for-understanding/#comment-270814</link>

		<dc:creator><![CDATA[josh g.]]></dc:creator>
		<pubDate>Sat, 27 Nov 2010 22:27:21 +0000</pubDate>
		<guid isPermaLink="false">/?p=8638#comment-270814</guid>

					<description><![CDATA[It&#039;s the 2nd part.  There is nothing inherent in observing stars, or the temperature of stars, that leads to addition of those temperatures.

The green and violet stars being made-up are flatly untrue bits, but as the rest of the data is roughly true (according to the writer) it&#039;s not as significant of a crime as the use of addition.]]></description>
			<content:encoded><![CDATA[<p>It&#8217;s the 2nd part.  There is nothing inherent in observing stars, or the temperature of stars, that leads to addition of those temperatures.</p>
<p>The green and violet stars being made-up are flatly untrue bits, but as the rest of the data is roughly true (according to the writer) it&#8217;s not as significant of a crime as the use of addition.</p>
]]></content:encoded>
		
			</item>
		<item>
		<title>
		By: Alex		</title>
		<link>/2010/ps-check-for-understanding/#comment-270802</link>

		<dc:creator><![CDATA[Alex]]></dc:creator>
		<pubDate>Sat, 27 Nov 2010 20:45:42 +0000</pubDate>
		<guid isPermaLink="false">/?p=8638#comment-270802</guid>

					<description><![CDATA[This one is a good example of BOTH kinds of pseudocontext. It assumes that you can tell what the temperature or &quot;color&quot; of a star is just from going outside and looking up. Second, it assumes anyone would care about adding the temperatures of stars that are billions of miles away from each other.]]></description>
			<content:encoded><![CDATA[<p>This one is a good example of BOTH kinds of pseudocontext. It assumes that you can tell what the temperature or &#8220;color&#8221; of a star is just from going outside and looking up. Second, it assumes anyone would care about adding the temperatures of stars that are billions of miles away from each other.</p>
]]></content:encoded>
		
			</item>
	</channel>
</rss>
