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Ask Dr. Math FAQ: Prime Number...

Number theory (Math 4) 
Java Applet 
Support Material 

[0]

Answers to the frequently asked questions including: What is a prime number? How can you find prime numbers? What's the Sieve of Eratosthenes? What's the largest known prime?
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Ask Dr. Math: FAQ: Learning to...

Factor (Math 4) 
Java Applet 
Support Material 

[1]

Students regularly ask Doctor Math questions about how to factor. Here are some answers from the archives.
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Color by Numbers

Number theory (Math 4) 
Sketchpad 
Tool 

[0]

Students investigate patterns produced on a grid of numbers generated through addition and multiplication of the whole numbers. The focus is on elementary number theory concepts such as even/odd, fact...
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Containers

Number theory (Math 4) 
Java Applet 
Technology PoW 

[1]

Use two measuring cups of a particular size to figure out how to measure out other quantities.
NOTE: A free login is required. Sign up using the link on the login page, or use your...
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Digit Card Problems

Factor (Math 4)+ 
Computer 
Tool 
$ 
[0]

Alterable worksheet in which students are presented with four digits and are asked to form twodigit numbers that sum to be a multiple of a given number, or are asked to choose two factors of a given ...
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Everyday Mathematics® Divisibi...

Divisibility tests (Math 4)+ 
iPad 
Tool 
$ 
[0]

This game offers a way to practice recognizing multiples of a number and applying divisibility tests. Players are presented with a target divisor and number globes in the playing area. They click the ...
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Factor POP!!

Factor (Math 4)+ 
iPhone 
Tool 

[0]

Factor POP! challenges users to utilize math skills and quick fingers. Buttons scroll across the screens at a chosen speed, and the user has to pop the buttons that are multiples or factors of the cho...
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Factor Table

Factor (Math 4) 
Flash 
Tool 

[0]

Is the number in a row a factor of the number heading a column? If so, drag its cofactor into the given square; if not, drag the red X. Click a square to see the two numbers; click again to see a vis...
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Factor Tree

Factor (Math 4) 
Java Applet 
Tool 

[10]

This manipulative allows you to construct factor trees (to the prime factors) for two numbers, and then from the prime factorization, you are asked to identify the Least Common Multiple (LCM) and the ...
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Factorgram

Prime factorization (Math 4) 
Flash 
Tool 

[0]

Drag prime numbers into the diagram to see if they are factors of the given number. Numbers you have tried so far will be listed to the right of the diagram.
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Factoring Unit Quiz

Number theory (Math 4) 
JavaScript 
Tool 

[1]

The user can test their understanding of basic concepts of factoring, such as the greatest common factor and least common multiple using this online interactive quiz.
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Factorizar

Factor (Math 4) 
Java Applet 
Tool 

[0]

Aprenda sobre factores construyendo arreglos rectangulares en una cuadrícula.
versión en inglés
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Factorizar 2

Factor (Math 4) 
Java Applet 
Tool 

[0]

Aprenda sobre factores construyendo arreglos rectangulares en una cuadrícula.
versión en inglés
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Factorize

Factor (Math 4) 
Java Applet 
Tool 

[2]

Learn about factors through building rectangular arrays on a grid.
Spanish version also available.
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Factorize 2

Factor (Math 4) 
Java Applet 
Tool 

[0]

Learn about factors through building rectangular arrays on a grid.
Spanish version also available.
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Factors Lesson

Prime (Math 4)+ 
Calculator 
Lesson Plan 

[1]

Students will learn how to factor numbers by using manipulatives and computer applets.
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Factors and Multiples

Prime (Math 4)+ 
JavaScript 
Tool 

[3]

The user learns about factors, multiples, prime and composite numbers, and how to find factors and multiples of given numbers. After veiwing examples, users can interactively practice factoring numbe...
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Factors, Primes, and Factoriza...

Prime factorization (Math 4) 
Flash 
Support Material 

[0]

This interactive multimedia tutorial explores prime numbers and factors, without the use of division per se.
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Flash Math

Multiple (Math 4) 
Flash 
Tool 

[6]

In a game context students select a sequence of numbers using the "rule" stated for that game. There are three levels that a user can choose including easy, medium, or hard.
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Greatest Common Factor

Greatest common factor (Math 4) 
JavaScript 
Tool 

[0]

The user learns about the greatest common factor and how to find it for two numbers. After viewing examples, users can interactively practice finding the greatest common factor for two numbers.
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Grouping I and II

Number theory (Math 4) 
Sketchpad 
Tool 

[0]

Grouping I: The goal of this activity is twofold. First, it introduces students to Sketchpad's most important tools and menu commands. Second, it helps students appreciate how grouping objec...
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HandsOn Math Hundreds Chart

Number theory (Math 4) 
iPad 
Tool 
$ 
[0]

HandsOn Math: Interactive Hundreds Chart creates a virtual math playground where students explore, investigate and discover mathematical concepts. Students use colored markers on the Interactive H...
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HandsOn Math: Tangle Tables

Factor (Math 4) 
iPad 
Tool 
$ 
[0]

Tangle Tables offers 12 levels of difficulty. Younger learners will benefit from the settings where the challenge is to find the sum or product and complete the table. For older students teachers may ...
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Highest Common Factor

Factor (Math 4)+ 
Computer 
Tool 
$ 
[0]

Students write the greatest common factor of two given integers in this alterable worksheet. Fee required to print; see this page for details.
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Jump Along

Number theory (Math 4) 
Sketchpad 
Tool 

[1]

This activity involves a number line along which students observe consecutive jumps, controlling both the number of jumps and jump size. This sketch can be used to model basic questions involving the ...
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