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Topic (Course) 
Technology 
Type 
$? 
Rating 

Number Base Clocks

Number sense (Math 5)+ 
Java Applet 
Tool 

[0]

Visually explore counting and place value with different number bases, from base 2 to base 16, and up to the hundreds place using a clock like interface. The activity also allows you to look at the nu...
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Classroom narrative: Frogs

Number sense (Math 6)+ 
Computer 
Story 

[0]

A story from the middle school classroom: the mathematical ideas and questions encountered by one group of students worked with the Frogs microworld.
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Colour Calculator

Number sense (Math 6)+ 
JavaScript 
Tool 

[0]

Students are able to explore fraction and decimal number patterns with this colour calculator.
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Miranda y el Principiante

Number sense (Math 6)+ 
Spreadsheet 
Technology PoW 

[0]

Usa una base de datos para comparar los sueldos del basquetbolista famoso con el del principiante.
versión en inglés
NOTE: A free login is required. Sign up using the lin...
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Simple Savings Calculator

Number sense (Math 7)+ 
JavaScript 
Tool 

[0]

This is an interactive tool for examining savings with different interest rates, initial contributions, ongoing contribution levels over time. It does not have a graphical representation, but is nice ...
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Building Houses

Number sense (PreKindergarten)+ 
Java Applet 
Lesson Plan 

[0]

Students count, order, and compare the different sizes of integer bars as they make house designs.
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Episode 5: Representing Number...

Number sense (PreKindergarten)+ 
Flash 
Lesson Plan 

[0]

Activities to develop understandings of the representations of numbers 1 to 5.
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Count Us In: Game 3

Number sense (PreKindergarten)+ 
Flash 
Tool 

[0]

Choose a level and then count all the things in the picture that are the same as the one in the count box.
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Counting to 10

Number sense (PreKindergarten) 
Computer 
Tool 

[0]

This activity stresses the teaching of numbers in relation to a growing mass rather than the numerals themselves. As the activity begins a numeral and item are shown on the screen. As a computer key o...
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Number Train

Number sense (PreKindergarten) 
Computer 
Tool 

[0]

As the shockwave activity opens there is a train engine labeled with a "1" and a car. Students are directed by sound and text to move the car behind the engine. After ten cars have been added to the t...
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Number Labelling

Number sense (PreKindergarten)+ 
JavaScript 
Tool 

[0]

Drag the number names onto the numbers. Names turn green when they're correctly placed.
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Simple Scales

Number sense (PreKindergarten)+ 
Flash 
Tool 

[0]

Use the Simple Scales to weigh the bears. This is an openended activity that lends itself to problem solving activities.
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Number Recognition to 10

Number sense (PreKindergarten)+ 
Flash 
Tool 

[0]

This activity develops number recognition up to 10. The activity begins with sequencing the numbers and words one to ten (1 to 10). After completing this first part, the number line resets and the seq...
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Number Balance

Number sentences (Math 1)+ 
Flash 
Tool 

[0]

An activity for developing understanding of simple equations. Hide individual numbers or symbols as you wish. Designed for teacherled investigations. Find this activity in this list for a Word docume...
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Number Balance KS2

Number sentences (Math 3)+ 
Flash 
Tool 

[0]

An activity for developing understanding of simple equations. Hide individual numbers or symbols as you wish. Uses the less than and greater than symbols as well as equals.
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Ask Dr. Math FAQ: Prime Number...

Number theory (Math 3)+ 
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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Sieve of Eratosthenes

Number theory (Math 3)+ 
Java Applet 
Tool 

[0]

This virtual manipulative displays a grid containing numbers from 1 to 200. You can use it to explore patterns and relationships involving multiples.
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Color by Numbers

Number theory (Math 3)+ 
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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Odd or Even

Number theory (Math 3)+ 
Flash 
Tool 

[0]

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

Number theory (Math 3)+ 
Flash 
Tool 

[0]

This drag and drop Venn Diagram simulation lets students solve a mathematical problem based on number properties using a range of different Venn diagrams. There are 5 different levels involving a rang...
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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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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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The Hispaniola Water Shortage

Number theory (Math 4)+ 
Java Applet 
Tool 

[0]

Students are asked to use virtual containers of water, of definite sizes, and combine them in various ways to come up with as many different resulting volumes as possible.
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Properties of Numbers

Number theory (Math 4)+ 
Flash 
Tool 

[0]

Test yourself with these questions on properties of numbers.
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Number Works Applet

Number theory (Math 5)+ 
Java Applet 
Tool 

[0]

This applet calculates numbers, such as prime numbers, prime factors, least common multiple (LCM), greatest common divisor (GCD) or also called highest common factor (HCF), ratio simplifications. The ...
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