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Topic (Course) 
Technology 
Type 
$? 
Rating 

Graph of the US Income Distrib...

Large numbers (Math 4) 
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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Greatest Common Factor

Greatest common factor (Math 4) 
JavaScript 
Tool 

[0]

The user learns about the greatest common factor and how to find it for two numbers. After viewing examples, users can interactively practice finding the greatest common factor for two numbers.
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How Much Pizza to Order?

Equivalent fractions (Math 4)+ 
JavaScript 
Tool 

[0]

The program raises the problem from a hypothetical party where the guests ask for a specific fraction of pizza. Guests can only choose two types of pizza for each party. The program calls for the tota...
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Input/Output Machines

Equations and functions (Math 4) 
JavaScript 
Tool 

[0]

This is a collection of mathlets that model functions as Input/Output machines. In addition to the concept of input/output machines the concepts modeled include:

Jeff's Utilities: Simple Conve...

Measurement (Math 4) 
JavaScript 
Tool 

[2]

Simple conversion utilities for such measures as lengths, areas, volumes, liquid measures, weights, time, speed, temperature, money, bytes, Roman numerals, and more.
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Kilograms to Pounds

Weight/mass (Math 4) 
JavaScript 
Tool 

[0]

Online conversion tool to convert from the weight unit of kilogram to the weigh unit of pounds.
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Least Common Multiple

Least common multiple (Math 4) 
JavaScript 
Tool 

[0]

The user learns about least common multiples and how to find them. After viewing examples, users can interactively practice finding the least common multiple of two numbers.
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Marble Mania!

Probability (Math 4) 
JavaScript 
Tool 

[1]

This is an interactive activity in which the randomness and probability of marbles being pulled out of a "bag" are calculated automatically and for trials up to 500. In short, students will be able...
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Math Cats Balance

Weight/mass (Math 4) 
JavaScript 
Tool 

[0]

You can choose from a wide range of objects to place on this scale  from electrons to galaxies! Click the arrow next to "thin cat" and scroll up and down the object lists to see all the choices.
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Math Water Table

Capacity/volume (Math 4)+ 
JavaScript 
Tool 

[0]

Math Water Table is an online liquid simulator that
models the flow of water through triangular and
rectangular shapes.
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Measure It!

Length/height (Math 4)+ 
JavaScript 
Tool 

[2]

The user is shown a ruler with a red bar above it. The task is to determine the length of the red bar and choose the correct answer from the four choices given. Users can choose the level of difficult...
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MentalMath eXcitement

Mental math (Math 4) 
JavaScript 
Tool 

[1]

Mental math practice and competition. Covers addition, subtraction, multiplication, division, comparison, and "gap filling" (basic algebra). For registered users (registration free), results are dis...
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Money Experience for Kids

Money/coins (Math 4) 
JavaScript 
Tool 

[0]

Four different money activities let kids count money, make change, and spend money within a limit.
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Multiples and Factors

Factor (Math 4)+ 
JavaScript 
Tool 

[2]

Review knowledge of multiples and factors through practice worksheets, fact sheets, and a threelevel quiz. A page for instructors gives UK curricular alignments and other useful web sites for teachin...
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Multiplication Worksheets

Operations with numbers (Math 4) 
JavaScript 
Tool 

[0]

A script which allows control over generating positive whole number multiplication problems of various lengths.
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Multiply and Divide by 10, 100...

Multiplication (Math 4)+ 
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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Multiplying Decimals

Multiplying decimals (Math 4) 
JavaScript 
Tool 

[0]

The user reviews the steps of how to multiply decimals. After viewing examples, users can interactively practice multiplying the two decimal numbers given.
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Negative Numbers

Understanding integers (Math 4)+ 
JavaScript 
Tool 

[0]

Two mathlets that use pulleys to model the behavior of negative numbers under addition and multiplication.
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Online Interactive Multiplicat...

Multiplication (Math 4) 
JavaScript 
Tool 

[0]

An online interactive multiplication grid designed for students who are having difficulty learning their times tables. Access this tool from the Internet or save the page and open the file from your b...
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OpenArithmetic

Operations with numbers (Math 4)+ 
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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Pentomino puzzles

Symmetry (Math 4)+ 
JavaScript 
Tool 

[0]

Rotate pentominoes to tile an 8×8 grid. This JavaScriptpowered online puzzle lets you select from a variety of decorative patterns and graphic designs.
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Percent

Percentages (Math 4) 
JavaScript 
Tool 

[0]

The user reviews percentages and how to write percentages. After viewing examples, users can interactively practice finding the given percent of each number.
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Place Value

Place value (Math 4) 
JavaScript 
Tool 

[1]

The user learns about place value. After viewing examples, users can interactively practice determining the place value of a specific digit in a given number.
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PrimaryPaths

Operations with numbers (Math 4) 
JavaScript 
Tool 

[3]

PrimaryPaths (which replaced the PrimaryMath.org site) provides interactive educational tools that teachers and parents can use to make learning easier. Our website provides interactive arithmetic pr...
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Proportion Solver

Proportions (Math 4) 
JavaScript 
Tool 

[1]

A JavaScript which demonstrates solving proportions using the proportion equation.
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