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Technology 
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Suan Pan in Various Number Sys...

Addition (Math 4)+ 
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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The Abacus in Various Number S...

Addition (Math 4)+ 
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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Base 10 Subtraction Mathlets

Operations with numbers (Math 4)+ 
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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Basic Facts Worksheet

Operations with numbers (Math 4) 
JavaScript 
Tool 

[0]

Each instance generates a new 100 problem worksheet of basic math facts. Ideal for timed drills/speed drills. Note: Reload the page and another set of problems will be generated.
There is an...
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Cryptarithms

Operations with numbers (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Cryptarithms are brain teasers obtained when digits in numerical calculations have been replaced by letters.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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Estimating and Rounding Decima...

Rounding (Math 4)+ 
JavaScript 
Tool 

[1]

The user reviews how to estimate and round off whole and decimal numbers. After viewing examples, users can interactively practice rounding the given numbers to specific place values.
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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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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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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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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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Times Tables

Multiplication (Math 4)+ 
JavaScript 
Tool 

[2]

The Times Table module can be used as a starting point for learning a particular table; a reinforcement of number patterns and tables already covered; and practicing knowledge of tables. Linked resour...
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Jump Along

Operations with numbers (Math 4) 
Sketchpad 
Tool 

[1]

This activity involves a number line along which students observe consecutive jumps, controlling both the number of jumps and jump size. This sketch can be used to model basic questions involving the ...
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Mystery Sums 1

Addition (Math 4) 
Sketchpad 
Tool 

[1]

Students use logic and early algebra reasoning skills to find the secret numerical values of four letters.
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Reach the Target

Estimation (Math 4) 
Sketchpad 
Tool 

[1]

Students use their knowledge of place value to identify the locations of unlabeled tick marks along number lines. These locations are exact to units, tenths, and all the way up to hundred thousandths.
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Set Puzzles

Addition (Math 4) 
Sketchpad 
Tool 

[1]

Students use logical reasoning skills to determine what numbers go inside three different colored circles to create given sums. Students are informally introduced to the concept of sets.
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Number Line App

Operations with numbers (Math 4) 
TI73 Explorer 
Tool 

[0]

With the Number Line App, students are able to see a dynamic, visual representation of a number line while adding and subtracting whole number and integers using arrow diagrams (vectors) and arithmeti...
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SMILE Mathematics App

Operations with numbers (Math 4) 
TI73 Explorer 
Tool 

[0]

The SMILE App contains five games that reinforce skills from the number & operations, geometry, and measurement standards. The games are a part of the SMILE Mathematics computer software suite develop...
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Math by Hand App

Operations with numbers (Math 4) 
TI83/TI84 
Tool 

[0]

Reinforce how to perform the "standard algorithms" for addition, subtraction, multiplication and division with the Math by Hand App on the TI73 Explorer(tm). Students can see stepbystep details emp...
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Digitron Lite

Operations with numbers (Math 4) 
iPad 
Tool 

[0]

This game exercises math skills by asking players to quickly combine numbers and operators to solve common arithmetic problems. Operators can be changed by tapping on screen, which cycles them in the ...
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Everyday Mathematics® Addition...

Addition (Math 4) 
iPad 
Tool 
$ 
[0]

This game offers a way to practice and reinforce basic addition facts (0–10) and number comparisons. Players take turns drawing two cards, finding their sums, and then comparing the sums. Players scor...
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Everyday Mathematics® Baseball...

Multiplication (Math 4) 
iPad 
Tool 
$ 
[0]

This game offers a way to practice and reinforce basic multiplication facts (1–12). Two players, representing 2 teams, play a 3inning baseball game as they practice their 1–12 multiplication facts. T...
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Everyday Mathematics® Baseball...

Multiplication (Math 4) 
iPad 
Tool 
$ 
[0]

This game offers a way to practice and reinforce basic multiplication facts (1–6). Two players, representing 2 teams, play a 3inning baseball game as they practice their 1–6 multiplication facts. The...
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Everyday Mathematics® Beat the...

Multiplication (Math 4) 
iPad 
Tool 
$ 
[0]

This game offers a way to practice and reinforce basic multiplication facts (0–10). Players have 20 seconds to answer multiplication fact problems and beat the computer. Players score points for corre...
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