Volume 10, Number 22
Back to Table of Contents
May 30 2005 Vol. 10, No. 22
THE MATH FORUM @ DREXEL INTERNET NEWS
MathMem | Fractions and Ratios | Math-A-Thon
MATHMEM
http://www.atlanticwinds.com/mathmem/
Jim Guinness, Wachusett Regional High School in Massachusetts,
has compiled a list of mnemonics and similar memory aids that
help students remember math conventions, algorithms,
definitions, techniques, and formulas. "Most high school math
teachers are familiar with using PEMDAS, FOIL, and
SOH-CAH-TOA in this way. More exotic techniques, like singing
the quadratic formula, can also be helpful if they suit your
teaching style ..." Additional contributions for remembering
math concepts K-12 welcome by e-mail or telephone.
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TEACHER2TEACHER FAQ: TRICKS FOR LEARNING MATH
http://mathforum.org/t2t/faq/faq.tricks.html
Answers to a frequently asked question: What are some math
tricks and mnemonic devices I can use with my students?
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FRACTIONS AND RATIOS
http://whyslopes.com/etc/fractions/
Alan Selby has added a new section called Fractions and Ratios
to his site "Appetizers and Lessons for Mathematics and
Reason." This new area "offers a thought-based development of
fractions, what they are, how to compare, add, multiply and
divide them."
Selby organized his pages under these topics:
1. What is a Fraction
2. Multiplication I: Unit Fraction of Unit Fraction
3. Multiplication II: Unit Fraction of a Simple Fraction
4. Multiplication III: Simple Fraction of a Simple
Fraction
5. Equivalent Fractions
6. Mixed Numbers
7. Comparison of Fractions
8. Addition & Subtraction I: Case of Like Denominators
9. Addition & Subtraction II: Case of Unlike Denominators
10. Addition & Subtraction III: Efficiency Matters - Use
of LCD
11. Multiplication IV: Efficient Ways to Multiply Fractions
12. Division of Fractions
13. Two Term Ratios
14. Implied Ratios
15. Multiple Ratios
The earlier site area on solving linear equations visually
reinforces Selby's concept of fractions and arithmetic
operations on them, while geometrically introducing algebra.
http://whyslopes.com/etc/solvingLinearEquations/
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MATH-A-THON
http://www.mathathon.org/
Students participating in a Math-A-Thon obtain sponsors and
earn prizes by completing "funbooks" of math problems such
as hidden messages, puzzles, and pure arithmetic operations.
Proceeds from this supplemental math program build an
endowment fund to ensure St. Jude Children's Research
Hospital's continued efforts in research and treatment of
childhood catastrophic diseases such as cancer.
Open to participation for children in grades K-9 across the
United States, Math-A-Thon began in the late 1970s. The
website also offers online games such as Number Blaster and
puzzles such as Math Squares, E-cards to send, and
screensavers to download.
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