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Topic (Course) 
Technology 
Type 
$? 
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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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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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Lowest Common Multiple

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

Students write the lowest common multiple of two given integers in this alterable worksheet. Fee required to print; see this page for details.
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Sorting Numbers in a Venn Diag...

Multiple (Math 4) 
Computer 
Tool 
$ 
[0]

Alterable worksheet in which students sort sets of numbers on Venn diagrams. Fee required to print; see this page.
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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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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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Math Game 2 Players

Prime (Math 4) 
iPad 
Tool 
$ 
[0]

This app is designed for 2 players and includes 8 math games:
 Make arrays by rolling dice! ( Area dice game )
 Coordinate Plane
 Place Value
 Addition bomb game
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Polyrhythm Problem

Least common multiple (Math 4) 
Java Applet 
Activity 

[0]

Students investigate different rhythms, both aurally and visually, using the applet. They then quantify these rhythms based on the accented beats.
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The Hispaniola Water Shortage ...

Number theory (Math 4) 
Java Applet 
Activity 

[0]

Gives students an introduction to number theory by emphasizing the significance of starting with containers of different parity, as compared to containers of the same parity. Some implied work with mo...
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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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Polyrhythm Teacher Support

Least common multiple (Math 4) 
Java Applet 
Lesson Plan 

[0]

Links to NCTM Standards, related activities, lessons, Ask Dr. Math archives, vocabulary, and other resources.
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The Hispaniola Water Shortage ...

Number theory (Math 4) 
Java Applet 
Lesson Plan 

[0]

Links to Standards, activities, lessons, Ask Dr. Math archives, vocabulary, other resources.
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Red vs. Blue

Prime (Math 4)+ 
Presentation software 
Lesson Plan 

[0]

Give students practice with multiplication, factoring, and prime and composite numbers through an exciting game  a game that exposes students to one of the great unsolved problems of mathematics.
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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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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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Fractions Balance

Number theory (Math 4) 
Android 
Tool 

[0]

Usually in elementary mathematics, pan scale balances are used only to display at the time of equilibrium in order to verify that two quantities are equivalent.
In this case, apart from that use, it ...
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Math Garden

Prime (Math 4)+ 
Android 
Tool 

[0]

In this app, the natural numbers are represented as plants:
If two unseeded seeds overlap, they add up.
If two seeds are planted, the plants multiply.
The plants are structured in branc...
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Touch Integers ℤ (+  × ...

Number theory (Math 4) 
Android 
Tool 

[0]

The fundamental theorem of arithmetic, also known as the unique factorization theorem or the uniqueprimefactorization theorem, states that every integer greater than 1 either is prime itself or is t...
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Touch Natural Numbers

Prime (Math 4)+ 
Android 
Tool 

[0]

With this app you can:

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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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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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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Odd or Even

Number theory (Math 4) 
Flash 
Tool 

[0]

Drag and drop the number tiles to their correct position on the Venn diagram.
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