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The California Frog-Jumping Contest: Algebra (Contexts for Learning Mathematics,Grades 4-6: Investigating Fractions, Decimals, and Percents) - William Jacob, Catherine Twomey Fosnot
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William Jacob, Catherine Twomey Fosnot:

The California Frog-Jumping Contest: Algebra (Contexts for Learning Mathematics,Grades 4-6: Investigating Fractions, Decimals, and Percents) - Paperback

2008, ISBN: 0325010242

[SR: 1333391], Paperback, [EAN: 9780325010243], FirstHand, FirstHand, Book, [PU: FirstHand], 2008-03-05, FirstHand, The California Frog-Jumping Contest: Algebra is one of five units in th.. More...

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The California Frog-Jumping Contest: Algebra (Contexts for Learning Mathematics,Grades 4-6: Investigating Fractions, Decimals, and Percents) - William Jacob, Catherine Twomey Fosnot
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William Jacob, Catherine Twomey Fosnot:

The California Frog-Jumping Contest: Algebra (Contexts for Learning Mathematics,Grades 4-6: Investigating Fractions, Decimals, and Percents) - Paperback

2008, ISBN: 0325010242

[SR: 1333391], Paperback, [EAN: 9780325010243], FirstHand, FirstHand, Book, [PU: FirstHand], 2008-03-05, FirstHand, The California Frog-Jumping Contest: Algebra is one of five units in th.. More...

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William Jacob:
The California Frog-Jumping Contest: Algebra (Paperback) - Paperback

2008

ISBN: 0325010242

ID: 22568220773

[EAN: 9780325010243], Neubuch, [PU: Heinemann USA, United States], Language: English . Brand New Book. The California Frog-Jumping Contest: Algebra is one of five units in the Contexts fo.. More...

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The California Frog-Jumping Contest: Algebra - William Jacob
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William Jacob:
The California Frog-Jumping Contest: Algebra - Paperback

ISBN: 9780325010243

ID: 9780325010243

The California Frog-Jumping Contest: Algebra The-California-Frog-Jumping-Contest~~Bill-Jacob Education>Education>Education Paperback, Heinemann

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5
The California Frog-Jumping Contest - William Jacob; Catherine Twomey Fosnot
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William Jacob; Catherine Twomey Fosnot:
The California Frog-Jumping Contest - Paperback

2008, ISBN: 9780325010243

ID: 19814954

Algebra, Softcover, Buch, [PU: Heinemann Educational Books,U.S.]

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Details of the book
The California Frog-Jumping Contest: Algebra

The California Frog-Jumping Contest: Algebra is one of five units in the Contexts for Learning Mathematics' Investigating Fractions, Decimals, and Percents (4 - 6) 
 
This unit uses the context of the famous short story by Mark Twain - The Celebrated Jumping Frog of Calaveras County - to develop equivalence and its use in solving algebraic problems. The context of a frog jumping along a track is used to foster number line representations in which students solve for an unknown amount, which is usually the length of a frog jump. Equivalent sequences of jumps are represented naturally on a double number line by having them start and end at the same location, with one expression shown on top of the line and the other shown underneath the line. The representation can then be used as a tool for solving the problem.
 
The unit begins with a problem in which students find the length of a bullfrog's jump, knowing the full length of a sequence of his jumps and steps. This context leads to using the number line as a tool for solving problems with unknowns. Next, students must find various approaches for lining up six- or eight-foot benches for two jumping tracks of lengths 28 and 42 feet. Students utilize the equivalence 6 + 6 + 6 + 6 = 8 + 8 + 8 to change one possible solution into a second possible solution and use the number line to represent this equivalence. A similar problem about fences is used to develop a combination chart, which is a useful representation for determining net gain (or loss) after an exchange.
 
The second half of the unit includes more frog-jumping problems as the frogs plan for their Olympic Games. Now students further explore the use of variables to represent more complex situations and solve for unknown amounts. Here, students use the number line to represent jumps in the problems and can separate off equal amounts of unknown lengths to determine the lengths of unknown amounts. As the unit progresses, the questions require that students investigate equivalent lengths of different-sized jumps and work with these equivalences flexibly to solve problems.
 
The complexity of learning to symbolize has been the subject of extensive research. One study, summarized in Adding It Up (National Research Council 2001, 264), illustrates typical difficulties students may have. Known as the reversal error, it is illustrated by work on the following problem: At a certain university, there are six times as many students as professors. Using S for the number of students and P for the number of professors, write an equation that gives the relation between the number of students and the number of professors. A majority of students, ranging from first-year algebra students to college freshmen, wrote the equation 6S=P. Apparently they used 6 as an adjective and S as a noun, following the natural language in the problem. However, they needed to multiply the number of professors by 6 to find the number of students. The correct response is 6P=S. Because learning to write algebraic expressions is so difficult, we don't push symbolizing early in this unit. The representation of the number line is used to fix students' attention on the distinction between the lengths of jumps and the number of jumps. Once this is set, students can begin symbolizing in problems like this in a meaningful way. The unit ends with the students constructing more formal algebraic notation as they develop methods to simplify their earlier representations.
 
To learn more visit http://www.contextsforlearning.com
 
 

Details of the book - The California Frog-Jumping Contest: Algebra


EAN (ISBN-13): 9780325010243
ISBN (ISBN-10): 0325010242
Hardcover
Paperback
Publishing year: 2008
Publisher: Firsthand
80 Pages
Language: eng/Englisch

Book in our database since 2011-03-15T03:45:55-04:00 (New York)
Detail page last modified on 2018-11-27T03:06:59-05:00 (New York)
ISBN/EAN: 9780325010243

ISBN - alternate spelling:
0-325-01024-2, 978-0-325-01024-3


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