Re: [MATHEDCC] If factoring is not important

Edward Laughbaum (elaughba@MATH.OHIO-STATE.EDU)
Tue, 06 Apr 1999 09:34:47 -0400

At 08:31 PM 4/4/99 -0700, Paula Castagna wrote:
>
>Ed:
>>
>>You wrote: "I am courious about how you know that "...using graphing
>calculator technology...students...memorize and regurgitate...". Do you
>think this is so because most teachers do not know how to teach with
>the graphing calculator? Or because all algebra textbooks don't
>integrate the use of graphing calculators appropriately? Or is this
>something you think to be true based on experience? Or have you seen
>research on the issue?"
>>
>I would be interested in any research on this, but classroom experience
>says that students have a most incredibly difficult time getting the
>connection between an equation and a graph, whether graphing linear
>equations, or finding the zeros of a function, or using the graph to
>factor a polynomial.
AS FOR RESEARCH, PLEASE SEE PENNY DUNHAM'S REFERENCE LIST ON RESEARCH AT
<http://www.TI.com/calc/docs/research.htm>. SHE PROBABLY HAS THE MOST
THOROUGH LIST. YOU MAY ALSO WANT TO CHECK THE 1994 0R 95 (DON'T REMEMBER)
NCTM MATH TEACHER ARTICLE BY DUNHAM AND TOM DICK. I WOULD GUESS SHE HAS
MORE RECENT INFO THAN WHAT IS ON THE WEB PAGE.

WE ALL HAVE OPINIONS BASED ON OUR OWN TEACHING, OBSERVATIONS, AND
PROFESSIONAL READINGS; IN MY CASE, I HAVE HAD AN EXTREMELY POSITIVE
EXPERIENCE WITH CALCULATORS AT THE BEGINNING, INTERMEDIATE, COLLEGE ALGEBRA
AND PRE-CALCULUS LEVELS. HOWEVER, FULL SATISFACTION WITH THEIR USE DIDN'T
COME UNTIL I HAD GOOD CLASSROOM MATERIALS THAT WERE REFORM IN NATURE AND IN
LINE WITH THE NCTM AND AMATYC STANDARDS. THEN I DID EXPERIENCE A HIGHER
LEVEL OF STUDENT UNDERSTANDING OF BASIC CONCEPTS. NOT JUST WITH THE TYPICAL
"GOOD" STUDENTS, BUT A VERY WIDE RANGE OF STUDENT BACKGROUNDS AND
ABILITIES. THIS INCLUDES THE FUNCTION-GRAPH CONNECTION.

>The conceptual difficulties are reflected in just how many years of
>development of mathematical systems it took before even the Cartesian
>coordinate system was developed.
>
>Yet, for all the difficulty the students have in this area, this basic
>concept connecting graphs and equations is probably our most valuable
>offering to them with respect to graphing.
AND NOT JUST CONNECTING THE FUNCTIONS IN SYMBOLIC FORM TO THE GRAPH, BUT
CONNECTING THE PARAMETERS IN THE FUNCTION TO THE RELATED BEHAVIOR EXHIBITED
BY THE FUNCTION.

Ed
=================

>Paula
>>___
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