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Topic (Course) 
Technology 
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5Tile Jigsaw Puzzle

Number sense (Math 4) 
Flash 
Tool 

[0]

The goal of this game is to reassemble the tiles in a square grid, in repeated numerical sequence.
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Abacus v1.4

Place value (Math 4) 
Java Applet 
Tool 

[1]

The Abacus Java Applet/Application is an implementation of an Abacus counting machine. The machine displays a total for the number represented by the machine's current state in addition to each digits...
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Aritmética del reloj

Number sense (Math 4) 
Java Applet 
Tool 

[0]

Los estudiantes aprenden operaciones de aritmética modular trabajando con diferentes tipos de relojes. Parámetros: Número de horas en el reloj.
versión en inglés
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Base 10 Blocks

Place value (Math 4) 
Java Applet 
Tool 

[0]

This program consists of a panel, as shown on the right, where one can click on any of three different block sizes that represent 1 unit, 10 units, and 100 units and drag them into the working pane...
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Base Blocks

Place value (Math 4)+ 
Java Applet 
Tool 

[10]

Illustrate addition and subtraction in a variety of bases.
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Base Blocks Decimals

Place value (Math 4) 
Java Applet 
Tool 

[2]

Add and subtract decimal values using base blocks.
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Bead Numbers

Place value (Math 4) 
Flash 
Activity 

[0]

This activity uses an interactive abacus to help develop and reinforce pupils' understanding of place value. The abacus has three pegs onto which beads are dropped, representing units, tens, and hundr...
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Birmingham Grid for Numbers (P...

Place value (Math 4) 
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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Caesar Cipher

Number sense (Math 4) 
Java Applet 
Tool 

[0]

Students practice simple arithmetic skills by encoding and decoding messages using an affine cipher.
Spanish version also available.
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Caesar Cipher II

Number sense (Math 4) 
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 4) 
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

Place value (Math 4) 
Java Applet 
Tool 

[0]

Learn about carrying and digits using chips.
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Clock Arithmetic

Number sense (Math 4) 
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 and Cryptogra...

Number sense (Math 4) 
Java Applet 
Lesson Plan 

[2]

The following discussions and activities are designed to lead the students to practice their basic arithmetic skills by learning about clock arithmetic (aka modular arithmetic) and cryptography.
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Clock Arithmetic on a 10hour ...

Number sense (Math 4) 
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 4) 
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 4) 
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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Clocks and Modular Arithmetic ...

Number sense (Math 4) 
Java Applet 
Support Material 

[0]

A dialogue between a student and a mentor on the relationship between clocks and modular arithmetic.
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Compare Numbers

Number sense (Math 4) 
Flash 
Tool 

[0]

Compare number size and place the greater or less than sign in the correct place. Use your choice of three levels of numbers to 100, 1000, or to 10000.
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Comparing Numbers

Place value (Math 4)+ 
Flash 
Tool 

[0]

This module introduces place value, place holders, comparing numbers and using the inequality signs > and < through fact sheets, worksheets, and a game. The accompanying quiz offers three levels of di...
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Cryptarithms

Place value (Math 4) 
JavaScript 
Tool 

[2]

Cryptarithms are brain teasers obtained when digits in numerical calculations have been replaced by letters. Customarily, distinct letters stand for different digits. Another term, Alphametics, denote...
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Cryptography and Ciphers Dialo...

Number sense (Math 4) 
Java Applet 
Support Material 

[0]

A dialogue between a student and a mentor on the relationship between cryptography and ciphers.
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DigitWize

Place value (Math 4) 
Flash 
Tool 

[0]

Choose integers or numbers with decimal places, then try to make up the target number by choosing numbers from the units, tens, hundreds, depending on your original choice. Available in Arabic, Bengal...
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El cifrado de César

Number sense (Math 4) 
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 4) 
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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