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Technology 
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Caesar Cipher II

Number sense (Math 7) 
Java Applet 
Tool 

[0]

Students practice simple arithmetic skills by encoding and decoding messages to determine the form for an affine cipher.
Spanish version also available.
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Caesar Cipher III

Number sense (Math 7) 
Java Applet 
Tool 

[0]

Students practice their reasoning and arithmetic skills by decoding messages to determine the form for an affine cipher.
Spanish version also available.
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Chip Abacus

Base ten, place value (Math 7) 
Java Applet 
Tool 

[0]

Learn about carrying and digits using chips.
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Clock Arithmetic

Number sense (Math 7) 
Java Applet 
Tool 

[1]

Students learn about modular arithmetic operations through working with various types of clocks. Parameters: Number of hours on the clock.
Spanish version also available.
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Clock Arithmetic on a 10hour ...

Number sense (Math 7) 
Java Applet 
Tool 

[0]

On a 10hour clock, there are only 10 numbers in the whole number system. However, every number has lots of different names. For example, the number before 1 is 0, so 10 = 0 on a 10hour clock.
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Clock Arithmetic on a 12hour ...

Number sense (Math 7) 
Java Applet 
Tool 

[0]

On a 12hour clock, there are only 12 numbers in the whole number system. However, every number has lots of different names. For example, the number before 1 is 0, so 12 = 0 on a 12hour clock.
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Clock Arithmetic on a 2hour c...

Number sense (Math 7) 
Java Applet 
Tool 

[0]

On a 2hour clock, there are only 2 numbers in the whole number system. However, every number has lots of different names. For example, the number before 1 is 0, so 2 = 0 on a 2hour clock.
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El cifrado de César

Number sense (Math 7) 
Java Applet 
Tool 

[0]

Los estudiantes practican aritmética sencilla codificando y decodificando mensajes mediante un cifrado afín.
versión en inglés
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El cifrado de César II

Number sense (Math 7) 
Java Applet 
Tool 

[0]

Los estudiantes practican aritmética sencilla codificando y decodificando mensajes para determinar la forma de un cifrado afín.
versión en inglés
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El cifrado de César III

Number sense (Math 7) 
Java Applet 
Tool 

[0]

Los estudiantes practican sus habilidades matemáticas y de razonamiento mediante la decodificación de mensajes para determinar la forma de un cifrado afín.
versión en inglés
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Number Base Clocks

Number sense (Math 7) 
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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NumberWorlds

Number sense (Math 7) 
Java Applet 
Tool 

[1]

With this applet, students can investigate various properties of numbers including patterns of even, odd, square and prime numbers, as well as multiples and factors. There are also different "worlds" ...
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Power Cards

Base ten, place value (Math 7)+ 
Java Applet 
Tool 

[0]

This site uses a puzzle to motivate learning about binary numbers and other bases. How does the computer guess the number you choose? How can you guess the number someone else chooses?
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Pythagoras' Mystery Tablet

Irrational numbers (Math 7) 
Java Applet 
Tool 

[1]

Try typing different side lengths as fractions or as decimals. Watch how this affects the computed area of the square at the bottom. How close can you get to the area values on Pythagoras' Tablet?
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Rational Numbers Triangle

Rational numbers (Math 7) 
Java Applet 
Tool 

[1]

Explore a triangular array that contains every positive
rational number exactly once.
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Secret Worlds: The Universe Wi...

Powers of ten (Math 7) 
Java Applet 
Tool 

[2]

View the Milky Way at 10 million light years from the Earth. Then move through space towards the Earth in successive orders of magnitude until you reach a tall oak tree just outside the buildings of t...
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The Abacus in Various Number S...

Base ten, place value (Math 7) 
Java Applet 
Tool 

[0]

An interactive Java applet showing one or two Russian abacuses with options to select the base of the number system and the number of wires. The applet displays the number matching the current config...
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Tower of Hanoi

Writing powers (Math 7) 
Java Applet 
Tool 

[2]

Solve the Tower of Hanoi problem with different levels and see an explanation of the recursion relationship involved.
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Tower of Hanoi

Writing powers (Math 7) 
Java Applet 
Tool 

[1]

The Tower of Hanoi puzzle was invented by the French mathematician Edouard Lucas in 1883. The goal is to move all the discs from the left peg to the right one. Try to move all the discs from one side...
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Towers of Hanoi

Writing powers (Math 7) 
Java Applet 
Tool 

[3]

Solve the tower problem and test your theory by varying the number of disks.
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Birmingham Grid for Numbers (P...

Base ten, place value (Math 7) 
JavaScript 
Tool 

[0]

Use this tool to reinforce students' understanding of place value. Students choose values from groups of units, tens, and hundreds, or decimal values, to reach the target number. Versions of this acti...
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Colour Calculator

Number sense (Math 7) 
JavaScript 
Tool 

[0]

Students are able to explore fraction and decimal number patterns with this colour calculator.
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Exponents

Exponents (Math 7)+ 
JavaScript 
Tool 

[1]

The user learns some basic rules about exponents and how to write in scientific notation. After viewing some examples, users can interactively practice doing simple operations with exponents.
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Exponents/Root Overview

Exponents (Math 7)+ 
JavaScript 
Tool 

[0]

How to use Exponents and Roots and how they are related.
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Graph of the US Income Distrib...

Large numbers (Math 7) 
JavaScript 
Tool 

[2]

Interact with a graph displaying family income across the population using a football field as the context. The height of the curve at any point is the height of a stack of $100 bills equaling that in...
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