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Technology 
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Suan Pan in Various Number Sys...

Addition (Math 3)+ 
Java Applet 
Tool 

[0]

An interactive Java gadget simulating suan panthe Chinese abacus. Options include selecting the number system base and the number of wires. The applet displays the number matching the configu...
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Tangram Puzzles

Geometry in the plane (Math 3) 
Java Applet 
Tool 

[0]

The user chooses a picture and tries to use the tangram pieces to fill in the outline.
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Tangrams

Geometry in the plane (Math 3) 
Java Applet 
Tool 

[0]

Use all seven Chinese puzzle pieces to make shapes and solve problems.
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Ten Frame

Addition (Math 3) 
Java Applet 
Tool 

[0]

In this interactive tenframes tool, users practice counting and adding to twenty. The frames help users think of numbers in relation to 10.
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Tessellate!

Tessellations (Math 3) 
Java Applet 
Tool 

[0]

This activity allows the user to create a figure that can be tessellated.
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Tessellation Tool

Symmetry (Math 3)+ 
Java Applet 
Tool 

[1]

This tool allows you to build tessellations and other designs by attaching the corners of various shapes to one another. To make a tessellation, you need to create an arrangement of repeating shapes w...
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Tessellations

Tessellations (Math 3) 
Java Applet 
Tool 

[2]

Using this virtual manipulative you may: add a block to the workspace; rotate a block; change the color of a block; remove a block; group blocks; zoom in/out
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The Abacus in Various Number S...

Addition (Math 3)+ 
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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The Factor Game

Factor (Math 3) 
Java Applet 
Tool 

[4]

The Factor Game is an interactive game that exercises the user's factoring ability. The user can test their skills against another human or the computer.
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Time  Analog and Digital Cloc...

Time (Math 3) 
Java Applet 
Tool 

[0]

Interactively set the time on digital and analog clocks.
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Time  Match Clocks

Time (Math 3) 
Java Applet 
Tool 

[5]

Users set the time on a digital clock to match the time displayed on an analog clock or vice versa.
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Time  What Time Will It Be?

Time (Math 3) 
Java Applet 
Tool 

[3]

Users manipulate the hands of a clock to indicate the time it will be before or after a given time.
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Time Card Calculator

Time (Math 3) 
Java Applet 
Tool 

[1]

A calculator designed to teach time. Helps students calculate time elapsed. Site also contains many Excel templates to help calculate time, as well as instructions on how to convert hours and minutes ...
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Towers of Hanoi

Patterns and sequences (Math 3) 
Java Applet 
Tool 

[3]

Solve the tower problem and test your theory by varying the number of disks.
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Triominoes

Geometry in the plane (Math 3) 
Java Applet 
Tool 

[0]

Manipulate the puzzle pieces and find multiple solutions.
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Turtle Geometry

Geometry in the plane (Math 3) 
Java Applet 
Tool 

[1]

Move and turn a turtle.
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Turtle Rectangles

Symmetry (Math 3) 
Java Applet 
Tool 

[1]

Change variables to observe differences in spiral designs.
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Types of Triangles

Classify geometric objects (Math 3) 
Java Applet 
Tool 

[4]

This JavaSketchpad applet accompanies the tPoW, Types of Triangles. Students are able to drag and manipulate four triangles and by noticing what happens they classify the triangles as either scalene, ...
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Virtual Paper Cut and Fold

Symmetry (Math 3) 
Java Applet 
Tool 

[2]

Learn how to make snowflake patterns and create a fivepointed star. The interactive site offers both a Flash tool and a faster, more fullyfeatured Java applet that allows you to save the snowflakes ...
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Weighing Riddles

Multiplication (Math 3)+ 
Java Applet 
Tool 

[0]

Users interact with a balance scale. Some of the weights are labeled in pounds (lbs) and others are labeled with an unknown (?) number of pounds. By putting some weights on both sides of the scale the...
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eNLVM  Interactive Online Mat...

General (Math 3) 
Java Applet 
Tool 

[2]

The eNLVM enhances the applets available through the National Library of Virtual Manipulatives (NLVM). It allows teachers to embed applets in lessons, make up questions to which students can submit an...
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Adding and Subtracting Decimal...

Adding decimals (Math 3)+ 
JavaScript 
Tool 

[5]

The user reviews how to add and subtract decimal numbers. After viewing examples, users can interactively practice adding and subtracting the decimal numbers given.
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Addition Worksheets

Addition (Math 3) 
JavaScript 
Tool 

[0]

A script which allows control over generating positive whole number addition problems of various selectable lengths.
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Base 10 Addition Mathlets

Operations with numbers (Math 3)+ 
JavaScript 
Tool 

[0]

The idea for the one, two, and three place addition mathlets is to show the steps in the base ten addition procedure in conjunction with a model. Each time the mathlet is run (by clicking the "New" b...
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Base 10 Subtraction Mathlets

Operations with numbers (Math 3)+ 
JavaScript 
Tool 

[0]

These mathlets illustrate the standard base 10 subtraction algorithm. They provide randomly generated subtraction problems with up to 4 decimal places and allow the student to step through the solutio...
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