### Volume 6, Number 14

 ``` 2 April 2001 Vol. 6, No. 14 THE MATH FORUM INTERNET NEWS AAA Math - Banfill | Grades 9-12 i-Math Investigations - NCTM Library of Problems of the Week AAA MATH - J.C. Banfill http://www.aaamath.com/ The goal of this site is to illustrate and provide free, online, interactive arithmetic exercises and problems. It contains a series of basic math lessons for students in formal elementary education math classes, home schooling or elsewhere. Math topics include: Addition, Algebra, Comparing, Counting, Decimals, Division, Equations, Estimation, Exponents, Fractions, Geometry, Graphs, Measurement, Mental Math, Money, Multiplication, Naming Numbers, Patterns, Percent, Practical Math, Place Value, Properties, Statistics, Subtraction Pages can also be accessed by Grade level: http://www.aaamath.com/world.html Alphabetical index of exercises: http://www.aaamath.com/aaamath-index.html -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- PUT THE HEART INTO MATHEMATICS CARDIAC OUTPUT, RATES OF CHANGE AND ACCUMULATION Grades 9-12 i-Math Investigations - NCTM http://Illuminations.nctm.org/imath/912/cardiac/ Students explore the measurement of the amount of blood being pumped by a heart. The goal of this investigation is a rich exploration of rates of change and accumulation in context. As presented here, the measurement is done from a discrete perspective, but the generalization to a continuous perspective and use of calculus (integrals) can be easily done. "Put the Heart into Mathematics" is one of five i-Math Investigations currently available for Grades 9-12. They are ready-to-use, online, interactive, multimedia math investigations including: - student investigations - teacher notes - answers - related professional development activities The other four titles for Grades 9-12 include: - Investigating Linear Relationships: The Regression Line and Correlation http://Illuminations.nctm.org/imath/912/LinearRelationships/ - Using Algebra and Discrete Mathematics to Investigate Population Changes in a Trout Pond http://Illuminations.nctm.org/imath/912/TroutPond/ - Shedding Light on the Subject: Function Models of Light Decay http://Illuminations.nctm.org/imath/912/Light/ - Whelk-Come to Mathematics: Using Rational Functions to Investigate the Behavior of Northwestern Crows http://Illuminations.nctm.org/imath/912/Whelk/ Each of these activities has a student version that can also be downloaded to use offline. -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- LIBRARY OF PROBLEMS OF THE WEEK http://mathforum.org/library/problems/ In response to teachers' requests, the Math Forum has re-organized its hundreds of archived Problems of the Week to make them easier to browse and search. Our new Library of Problems of the Week categorizes past PoWs according to mathematics topics and story topics. The PoW Library also offers ratings of difficulty levels of problems: A Rubric for Coding Problem Difficulty http://mathforum.org/library/problems/difficulty.html Read more about this new Library's features, including what teachers say about using the Problems of the Week: http://mathforum.org/library/problems/about_prob_library.html http://mathforum.org/library/problems/teachers_say.html -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- CHECK OUT OUR WEB SITE: The Math Forum http://mathforum.org/ Ask Dr. Math http://mathforum.org/dr.math/ Problems of the Week http://mathforum.org/pow/ Mathematics Library http://mathforum.org/library/ Teacher2Teacher http://mathforum.org/t2t/ Discussion Groups http://mathforum.org/discussions/ Join the Math Forum http://mathforum.org/join.forum.html Send comments to the Math Forum Internet Newsletter editors _o \o_ __| \ / |__ o _ o/ \o/ __|- __/ \__/o \o | o/ o/__/ /\ /| | \ \ / \ / \ /o\ / \ / \ / | / \ / \ ```