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Technology 
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Base 10 Blocks

Operations with numbers (Math 2) 
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

Addition (Math 2)+ 
Java Applet 
Tool 

[10]

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

Addition (Math 2) 
Java Applet 
Tool 

[6]

Use base ten blocks to model grouping in addition.
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Base Blocks Subtraction

Subtraction (Math 2) 
Java Applet 
Tool 

[6]

Base blocks consist of individual units, longs (containing 10 units), flats (containing 10 longs), and blocks (containing 10 flats) and can be used to show place value for numbers and to increase unde...
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Color Chips  Addition

Addition (Math 2) 
Java Applet 
Tool 

[2]

This virtual manipulative uses plusminus chips to demonstrate adding positive and negative values.
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Color Chips  Subtraction

Subtraction (Math 2) 
Java Applet 
Tool 

[0]

This virtual manipulative uses plusminus chips to demonstrate that subtracting values is the same as adding negative values.
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Diffy

Subtraction (Math 2) 
Java Applet 
Tool 

[1]

Solve an interesting puzzle involving the differences of given numbers.
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Five Frame

Addition (Math 2) 
Java Applet 
Tool 

[4]

In this interactive fiveframes tool, users practice counting and adding to ten. The frames help users think of numbers in relation to 5.
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Hiding Ladybug

Estimation (Math 2) 
Java Applet 
Tool 

[1]

The threepart ladybug example presents a rich computer environment in which students can use their knowledge of number, measurement, and geometry to solve interesting problems. Planning and visualizi...
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Math Owl

Operations with numbers (Math 2) 
Java Applet 
Tool 

[0]

Animated chalkboard lessons in adding, subtracting, multiplying, or dividing, from single digit addition to regrouping to multidigit multiplication and division. Follow the prompts that break down e...
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Mental Arithmetic Drills

Mental math (Math 2) 
Java Applet 
Tool 

[2]

Mental arithmetic drills in the four operations. Various difficulty levels are available.
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Number Line Arithmetic

Addition (Math 2)+ 
Java Applet 
Tool 

[1]

Illustrates arithmetic operations using a number line.
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Number Line Bars

Addition (Math 2)+ 
Java Applet 
Tool 

[1]

Use bars to show addition and subtraction on a numberline.
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Rectangle Division

Division (Math 2) 
Java Applet 
Tool 

[1]

Visualize and practice dividing numbers by using an area representation.
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Rectangle Multiplication

Multiplication (Math 2) 
Java Applet 
Tool 

[2]

Visualize the multiplication of two numbers as an area. Choose the latticeoption to draw a correspondence between the lattice method for multiplying numbers and an area representation. Choose t...
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Soroban in Various Number Syst...

Addition (Math 2)+ 
Java Applet 
Tool 

[0]

An interactive Java gadget simulating sorobanthe Japanese abacus. Options inlude selecting the number system base and the number of wires. The applet displays the number matching the configur...
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Space Math

Addition (Math 2) 
Java Applet 
Tool 

[1]

Space Math is a project designed to assist students to learn about place value and carrying.
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Suan Pan in Various Number Sys...

Addition (Math 2)+ 
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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Ten Frame

Addition (Math 2) 
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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The Abacus in Various Number S...

Addition (Math 2)+ 
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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Weighing Riddles

Multiplication (Math 2)+ 
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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Base 10 Addition Mathlets

Operations with numbers (Math 2)+ 
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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MathFlash  Speech Recognition...

Addition (Math 2)+ 
JavaScript 
Tool 

[0]

This JavaScriptbased game uses the HTML5 Web Speech API to quiz students on addition, subtraction, multiplication and division facts. Students progress through levels and create a Jackson Pollock ...
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Multiply and Divide by 10, 100...

Multiplication (Math 2)+ 
JavaScript 
Tool 

[0]

This module can be used as a starting point for learning multiplication and division by 10, 100 and 1000 using place value of digits and also by moving the decimal point. It includes converting betwee...
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OpenArithmetic

Operations with numbers (Math 2) 
JavaScript 
Tool 

[0]

OpenArithmetic.org, built by a group of people at the Chair of Internet Technology, Brandenburg University of Technology, Germany, is dedicated to the idea of providing open educational resources for ...
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