 Prime and Composite Numbers (SMILE)  Charlotte Goldwater, Kenwood Academy
A lesson for grades 59 that presents a systematic method of deciding whether a number is prime. From the Arithmetic section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative for Learning Enhancement.
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 Prime Curios!  G. L. Honaker, Jr., Chris K. Caldwell
A collection of curiosities, wonders and trivia related to prime numbers. Look up a number (up to 10^21+) and find what connections it has to the primes. The database has over 3400 curios corresponding to more than 1960 different numbers. The number of
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 Prime Factorization Machine  James Brennan
A page that runs a script that will return the prime factorization of a positive integer (limited to numbers less than 1,000,000). Even with this limit, numbers with very large prime factors may take a few minutes to factor if your computer has a slow
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 Prime Hunter Game  Benny Lam, Gameducate.com
Hunt for prime numbers (or the largest prime factor in a composite number) from a board with a random layout of digits. Free download, or shareware version available. For Windows.
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 Prime Listening  Ivars Peterson (MathTrek)
Mathematician Chris K. Caldwell of the University of Tennessee in Martin has developed a scheme for listening to sequences of primes  to hear both simple patterns and perplexing irregularities found among those numbers. "Multimedia allows the use of
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 Prime Number List  James Brennan
A page with a script that generates a list of prime numbers. Once started, it will run until you click 'Stop' or your computer runs out of memory. A second page writes the list to a new Web page suitable for printing.
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 Prime Numbers
Browse primes smaller than 10 billion, or see a list within a given range, or have such a list emailed to you.
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 Prime Numbers  MacTutor Math History Archives
Linked essay describing the work on primes from Pythagoras through Gauss, Legendre, Riemann, and Valee Poussin, with additional sections on still unsolved problems, the latest prime records, and other web sites, as well as 21 references (books/articles).
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 Prime Numbers  Math Forum, Ask Dr. Math FAQ
What is a prime number? What's the 'Sieve of Eratosthenes'? What is the largest known prime?
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 The Prime Pages  Chris Caldwell; Dept. of Mathematics & Computer Science, Univ. of Tennessee at Martin
An index of information on prime numbers. Definition; Articles and information on primes, including how to find and prove primality, and a wealth of historical information. Lists of primes and prime factorizations, including the first x primes and the
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 Prime Presentations  Karyn Hodgens
K12 workshops for professional development. An established educational consulting firm providing nationwide staff development training in the areas of math and science.
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 A Prime Surprise  Ivars Peterson (MathTrek)
Many of the 100 or so people who had helped with the nineprime effort immediately signed up for the new quest and began checking numbers. To everyone's surprise, Manfred Toplic (the same!) set the new record, reporting on March 2 that he had found 10
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 Prime Talent  Ivars Peterson (MathTrek)
Whole numbers have all sorts of curious properties. Consider, for example, the integer 1998. It turns out that 1998 is equal to the sum of its digits plus the cubes of those digits (1 + 9 + 9 + 8 + 13 + 93 + 93 + 83). What's the largest number for which
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 Prime Time  Georgia Louviere
Student activities and teachers' pages designed to teach students to identify the first 25 prime numbers by using the "sieve" method first used by Eratosthenes, to explain why the number one is neither prime nor composite, and to demonstrate why the number
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 Prime Treasure Hunt  Ivars Peterson (MathTrek)
The headline shouted, "Hacker accused of using U.S. West computers on math problem." The Associated Press news report, dated Sept. 15 [1998], went on to describe how computer consultant Aaron Blosser of Lakewood, Colo., had enlisted 2,585 computers at
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 Printable Math Worksheets  Homework for Kids
Practice worksheets, most with randomly generated problems, on the following topics: learning numbers, addition and subtraction, multiplication and division, fractions, decimals, time, measurements, perimeter, area and volume, integers, set theory, equations,
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 Printable Math Worksheets  TestDesigner.com
Free printable math worksheets, with answer keys, on number concepts, measurement, geometry, algebra, and statistics. Customize your own tests by selecting from the growing database of questions  or create your own.
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 Printables: Student Handouts  The Learning Network
PDF format printable handouts. Browse by grade or subject; check out the featured handouts; or search for a topic of your choice. Other resources also available through the Lesson Planning Center links on the site.
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 Print Free Graph Paper  Jeremy Hughes
PDFs of Cartesian, polar, isometric and logarithmic graph paper, optimized for printing. Available in Imperial units (inches) or metric units (centimeters), and in a choice of scales.
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 Prism Formulas (Ask Dr. Math FAQ)  Math Forum
Formulas for finding the surface area and volume of a prism.
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 PRISMNEO: Programming Remediation and Intervention for Students in Mathematics  Near North School District, Ontario, Canada
Handson Geometer's Sketchpad manipulativesplus "some things that cannot be done by hand!" The GSP files, as well as some QuickTime movies, are organized into Grade 7, Grade 8, and Grade 9 under the following topics: area, central tendency, equations,
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 The Prisoner Problem  Anne Arundel Community College
A classic logic problem about three prisoners, each of whom tries to determine what color his own hat is in order to be set free.
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 Prisoners of Time  U.S. Dept. of Education
Report of the National Education Commission on Time and Learning, April 1994, established as an independent advisory body to study the relation between time and learning in American schools. "The degree to which today's American school is controlled by
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 The Private Eye  Kerry Ruef
A handson, investigative teaching approach that attempts to stimulate the wonder of looking closely at the world, thinking by analogy, changing scale, and theorizing. It uses everyday objects, a jeweler's loupe, and a series of simple questions, which
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 Probability and Statistics  Math Forum
Links to some of the best Internet resources for probability and statistics: classroom materials, software, Internet projects, and public forums for discussion.
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 Probability Explorer  Hollylynne Stohl
An openended learning environment for Windows for representing data in multiple ways, engaging students in designing, simulating, and analyzing results of probability experiments. The software environment can be used for activities from upper elementary
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 Probability in the Real World  Math Forum, Ask Dr. Math FAQ
An introduction to the uses of probability in everyday life, including: weather forecasting, flipping coins, batting averages, lightning strikes, and the lottery.
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 Probability  Math Forum, Ask Dr. Math FAQ
An introduction to basic concepts.
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 Probability of Childhood Games (SMILE)  Robert Foote, Disney Magnet School
A lesson for grades 68 designed to explore the probability of several different events theoretically and experimentally using spinners and a Monopoly game board. From the Probability and Statistics section of a collection of almost 200 single concept
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 Probability of Getting Doughnuts  NASA Lewis Learning Technologies Project
A box of doughnuts contains 4 glazed, 3 creamfilled, and 2 jelly doughnuts. What is the probability of getting a creamfilled doughnut, eating it, and then getting a glazed doughnut? A detailed answer is provided. From NASA's 9th Grade Math Proficiency
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 Probability: Rolling Dice  NASA Lewis Learning Technologies Project
Probability: If a die is rolled 18 times, how many times is the number 2 expected to come up? A detailed answer is provided. From NASA's 9th Grade Math Proficiency Test.
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 Probability (S.M.A.R.T.)  Math Share Shop
Counting principle; Probability reference sheet. By students at Theodore Roosevelt H.S., Bronx, & Edward R. Murrow High School, Brooklyn.
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 Probability (SMILE)  Ana Timbers, Stockton School
A lesson for grades 68 designed to teach students the relation between theoretical probability and experimental results as they draw marbles from a bag and record the results. From the Probability and Statistics section of a collection of almost 200
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 Probability (SMILE)  Laura Willis Moss, South Shore Community Academy
A lesson designed to teach students to derive a general formula for the probability of a given event when each possible outcome is equally likely. From the Probability and Statistics section of a collection of almost 200 single concept lessons by the
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 Probability (SMILE)  Sandy Reed, Robert Fulton School
A lesson for grades 58 designed to help students learn, discover, explore and make a table of the number of times a specific event can occur, considering the results of two types of events: repeated sampling with replacement (events are independent)
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 Problem at the Art Gallery  Ivars Peterson (MathLand)
The Crystal Art Gallery was being readied for its grand opening, and I had to figure out how many guards were needed to make sure that every wall of paintings was under scrutiny. I was also ordered to keep costs as low as possible. The trouble was that
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 ProblemAttic  EducAide Software
Thousands of questions from New York State Regents exams, the National Assessment of Educational Progress (NAEP), the Trends in International Mathematics and Science Study (TIMSS), academic competitions, and other test banks. Sign up for a free account
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 The Problem of Points  Isaac Reed
An ageold gambling problem led to the development of probability by French mathematicians Pascal and Fermat in the 17th century.
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 Problem of the Week Articles  the Math Forum @ Drexel
These three published articles give context to using the Math Forum's Problems of the Week with students: Writing to Develop Understanding: The Math Forum @ Drexel's PoWs; Problems of the Week Engage Students with Special Needs; and The Impact of the
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 Problem of the Week  Richard Mann
A new word problem, math challenge, or other puzzle posted each week since November, 2008, by a Saint Ann's School teacher, with student acknowledgements to follow.
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 Problem of the week  Stephen Sproule
An index of sites offering Problems of the Week, organized by level: elementary, middle grades, high school, and advanced. Sproule appraises PoW sites according to whether or not they include solutions and archive past puzzles.
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 Problem Pictures  Richard Phillips
A CDROM of 184 attractive, unusual, or puzzling color photographs accompanied by activities for mathematics teaching. Images may defy explanation, motivate investigation, or inspire the viewer to answer a question. Other pictures may be the starting
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 The Problem Site  Douglas Twitchell
Math puzzles, brainteasers, strategy games, web quizzes, and informational pages. Flashpowered math games include Adders, Zap (slide tiles to move digits and add up to a specified sum), Side By Side (number rearrangement), One To Ten (given four numbers,
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 Problems of the Week  Math Forum @ Drexel
Our goal with the Problems of the Week is to engage students in nonroutine, constructedresponse mathematics investigations that integrate writing with problem solving in the math classroom. In addition to the Current PoWs and the Problems of the Week
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 Problem Solving in Mathematics  Jim Wilson; Univ. of Georgia
Problems in algebra, geometry, conversion, cryptarithm, "mean," trigonometry, and a mixture of all, many with comments and solutions, from a course given in the Dept. of Mathematics Education at the University of Georgia. The site also provides links
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 Problem Solving Island  Samuel A. Rebelsky
Challenging openended word problems on the topics of games, such as Blockade, Finger Multiplication, and The Word Pyramid; puzzles such as Error Correction, Error Detection, The Fake Coin, Friday the 13th, and Leap Birthdays; and problems based on figures,
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 Problem Solving  It Has to Begin with Noticing and Wondering  Hogan, Marie; and Alejandre, Suzanne
Middle school teacher Marie Hogan observed as the Forum's Director of Professional Development modeled a full cycle of the Problems of the Week (PoWs) in Hogan's West Covina (CA) classroom. This coauthored article about their experience around the PoW
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 Problem Solving  Jenine Newman
See how one fifth grade class explains different ways to solve word problems. Their strategies include making a table or chart; drawing a picture; acting it out; looking for a pattern; and working backwards. With examples and handdrawn illustrations.
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 Problem Solving Strategies  Finlay McQuade, Boğaziçi University (Turkey)
Strategies for solving problems, each illustrated with sample math challenges and worked solutions: draw a diagram; make a list; guess and check; divide and conquer; look for a pattern; start at the end. Also available in Turkish.
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 Problem Solving Using Percentages (SMILE)  Thelma A. Rex, Rosa L. Parks Middle School
A lesson designed to teach students to recognize three basic percentage problems: using M&Ms to find what percent one number is of another; find a percentage of a number; and find a number when the percent is known. From the Practical and Applied Math
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