Uso de calculadoras gráficas
Date: Thu, 27 Apr 1995 16:16:13 -0400
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From: arifkin@raven.cybercom.com (Lynn Rifkin)
To: Multiple recipients of list
Subject: [CALC-REFORM:2443] Re: graphing calculators and "cheating"
X-Comment: From the CALC-REFORM discussion list.
>Since 1993, we've required TI-82's of all students and use them regularly.
>The calculators are generally replacing the computer for two-diminsional
>graphing in calculus.
>
This brings up a question I am wrestling with. If a student programs notes
in his graphing calculator (formulas and "remember to do +C" type of notes),
is that considered OK?
I do not clear calculators and we are required to encourage their use (and
yes, I sometimes do have a part of a test that has no calculator use and
must be handed in before taking the calculator part). But if one kid fails
a test because he forgets, in early Calc 1, a derivative formula that the
other one "looked up" in his calculator, ... I am at the point that I
distribute formula sheets earlier in the course that I previously allowed it
but no where as early as the students would like! I believe memorization of
certain basics has a place in my class, though certainly not memorization to
the detriment of everything else.
The other part of this that is now upper most in my mind concerns the
upcoming Calculus AP exam. It requires the graphing calculator for the last
3/4 of the test, with the first 1/4 being totally pen and pencil and brain.
We were told they will not be cleared because programs need to be in them.
Is it proper to turn a deaf ear to students who plan to type in formulas
they often forget, like the area of a polar region or volumes by shells? Or
would I be doing them a favor by telling them to enter formulas since others
will be? (As an aside, only two of my class brings their own calculators.
I was given 6 to provide for daily use becasue I have a special class, 6
kids who already passed the AB portion of the test and I teach them the BC
portion and beyond. So they would be programming notes into school property!)
>I'm planning to get my hands on a TI-92 as soon as
^^^^^^
I would like to among the first!!
******************************************************
* Lynn Rifkin arifkin@raven.cybercom.com *
* arifkin@llnj.pppl.gov *
******************************************************
Date: Thu, 27 Apr 1995 16:35:09 -0400
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From: Robert Megginson
To: Multiple recipients of list
Subject: [CALC-REFORM:2444] Re: graphing calculators and "cheating"
X-Comment: From the CALC-REFORM discussion list.
Lynn Rifkin writes:
> This brings up a question I am wrestling with. If a student programs
> notes in his graphing calculator (formulas and "remember to do +C"
> type of notes), is that considered OK?
I understand the theoretical danger here, and have heard many faculty
at different institutions worry about this possibility, but I have
never really experienced this as a problem. (Or maybe I have, and
don't know it.)
I would certainly like to hear others' thoughts on this matter,
especially those who have had experiences with this problem.
Bob Megginson
University of Michigan
Department of Mathematics
Date: Thu, 27 Apr 1995 16:59:09 -0400
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From: MMG@gwuvm.gwu.edu
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Subject: [CALC-REFORM:2445] Re: Re: graphing calculators and "cheating"
X-Comment: From the CALC-REFORM discussion list.
A few years ago, I loaned my class of 30+ students the HP48S calculators
for the semester. I collected these machines at the end of the semester.
What I found interesting was the fact that one student in the
class had keyed in a whole bunch of formulas, including the basic
area and derivative formulas. I thought of confronting him about
cheating but it was unnecessary as he got one of the lowest
grades in the class and failed it.
What I noted from this episode is the fact that you can take any
tools or devices to the exam but if you have not learnt the basic
concepts of the course, nothing will help.
I gave the students two part exams: one where no calculators
were allowed and the other where they had to solve problems which,
for example, required computing arc length where the antiderivative
was not easy (impossible?) to find.
----------------------------------
Murli Gupta 202/994-4857
Department of Mathematics mmg@math.gwu.edu
George Washington University
Washington, DC 20052
Date: Thu, 27 Apr 1995 17:06:34 -0400
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From: bressoud@MACALSTR.EDU
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Subject: [CALC-REFORM:2446] Re: graphing calculators and "cheating"
X-Comment: From the CALC-REFORM discussion list.
Lynn rifkin writes:
>
>This brings up a question I am wrestling with. If a student programs notes
>in his graphing calculator (formulas and "remember to do +C" type of notes),
>is that considered OK?
>
Yes, it is okay. This is something that the AP Program wrestled with in
deciding whether or not calculators would have to be cleared before the
exam. Having determined that clearing all calculators would not work, they
have put the test together with the assumption that many students will have
recorded notes in the memory, and many students will not. This is the real
reason why the first part of the test does not permit the use of the
calculators.
David M Bressoud bressoud@macalstr.edu
Department of Mathematics and Computer Science 612-696-6559
Macalester College, 1600 Grand Avenue FAX: 612-696-6432
Saint Paul, MN 55105
Date: Thu, 27 Apr 1995 18:46:54 -0400
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From: "Chuck Lindsey"
To: Multiple recipients of list
Subject: [CALC-REFORM:2447] Re: Re: graphing calculators and "cheating"
X-Comment: From the CALC-REFORM discussion list.
> Date: Thu, 27 Apr 1995 16:35:25 -0400
> Reply-to: calc-reform@e-math.ams.org
> From: Robert Megginson
> To: Multiple recipients of list
> Subject: [CALC-REFORM:2444] Re: graphing calculators and "cheating"
> Lynn Rifkin writes:
>
> > This brings up a question I am wrestling with. If a student programs
> > notes in his graphing calculator (formulas and "remember to do +C"
> > type of notes), is that considered OK?
>
> I understand the theoretical danger here, and have heard many faculty
> at different institutions worry about this possibility, but I have
> never really experienced this as a problem. (Or maybe I have, and
> don't know it.)
>
> I would certainly like to hear others' thoughts on this matter,
> especially those who have had experiences with this problem.
>
> Bob Megginson
> University of Michigan
> Department of Mathematics
>
I have never experienced this problem either. Maybe I don't pay
close enough attention. At any rate, it is easy enough to test
formulas by having a portion of the test be done completely without
calculators, with "paper and pencil and brain" as was mentioned in an
earlier post. Personally, I have gone to giving tests in two parts:
one part in class, with pp&b only, and the other on a take-home part.
In fact, I usually allow students to work in pairs on the take-home
portion. This way, you can ask substantial questions.
Chuck Lindsey clindsey@fac.ftm.usf.edu
Assistant Professor of Mathematics
University of South Florida/Florida Gulf Coast University
8111 College Parkway
Fort Myers, FL 33919
(813) 432-5554 FAX:(813) 432-5599
Date: Thu, 27 Apr 1995 21:48:10 -0400
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From: arifkin@raven.cybercom.com (Alynn Rifkin)
To: Multiple recipients of list
Subject: [CALC-REFORM:2448] Re: graphing calculators and "cheating"
X-Comment: From the CALC-REFORM discussion list.
>Lynn rifkin writes:
>>
>>This brings up a question I am wrestling with. If a student programs notes
>>in his graphing calculator (formulas and "remember to do +C" type of notes),
>>is that considered OK?
>>
>
>
>Yes, it is okay. This is something that the AP Program wrestled with in
>deciding whether or not calculators would have to be cleared before the
>exam. Having determined that clearing all calculators would not work, they
>have put the test together with the assumption that many students will have
>recorded notes in the memory, and many students will not. This is the real
>reason why the first part of the test does not permit the use of the
>calculators.
>
>David M Bressoud bressoud@macalstr.edu
>Department of Mathematics and Computer Science 612-696-6559
>Macalester College, 1600 Grand Avenue FAX: 612-696-6432
>Saint Paul, MN 55105
I didn't know that! One would hope they (at ETS) would realize it and
consider the situation. But I am glad to hear that they worked around it.
I also read (inthe latest letter ETS sent us to show to the students) that
they will permit a student to have 2 calculators just in case. That's great
for several reasons including that some of my kids prefer to use their old
scientific for most calculations aside from ones needing the graphing calc's
power. Doing a factorial is so much easy on an old one!
-----------------------------------------------------
Lynn Rifkin || arifkin@raven.cybercom.com
-----------------------------------------------------
Date: Fri, 28 Apr 1995 04:05:26 -0400
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From: madd@kudu.ru.ac.za (MADD)
To: Multiple recipients of list
Subject: [CALC-REFORM:2450] Re: Re: graphing calculators and "cheating"
X-Comment: From the CALC-REFORM discussion list.
Murli Gupta writes:
>
>
> What I noted from this episode is the fact that you can take any
> tools or devices to the exam but if you have not learnt the basic
> concepts of the course, nothing will help.
>
Right! I don't think one should fear GCs and PCs from that side.
I don't know if I've mentioned this before, but when I taught at BU we
allowed students to bring in to the exams (and use) everything they
could think of: textbooks, notes, laptops, tables, carefully
prepared sets of formulas... but only good students passed.
Cheating is simply not possible if the test has been set properly. My
only fear is that today's inclination is to ask questions which are
directed to GCs, not to students. Which means that everybody will be
able to pass exams, regardless of the mathematical ignorance. As a
result, we'll have more incompetent math teachers, and the vicious
circle will spin faster and faster.
Darko
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