Pattern Blocks - A Virtual Manipulative
Use six common geometric shapes to build patterns and solve problems.

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
-Clone a block
-Clear the workspace
There are more instructions to the right of the manipulative.  Activities can be found above the workspace.

Author(s): No creator set

Block Patterns – A Virtual Manipulative
Block Patterns – Analyze sequences of figures using pictures, tables, plots, and graphs. There are more instructions to the right of the manipulative.
Author(s): No creator set

Number Line - Virtual Manipulative
This virtual manipulative can be used to picture whole number operations: addition, subtraction, multiplication and division, carried out on a number line. There are more instructions on the right side of the Java applet.
Author(s): No creator set

Number Line Bars - Virtual Manipulative
This is a versatile tool that can be used to illustrate a variety of number operations. The background of the workspace is marked by light gray grid lines. The default step-size of the grid lines is 1 unit.  There are more instructions on the right side of the Java applet.
Author(s): No creator set

Number Line Bars - Fractions - Virtual Manipulative
This is a very versatile tool that can be used to illustrate a variety of number operations. The background of the workspace is marked by light gray grid lines. The default step-size of the grid lines is 1/10 unit. There are more instructions on the right side of the Java applet.

Step size

Author(s): No creator set

Number Line Bounce - Virtual Manipulative
This virtual manipulative can be used to visualize a sequence of operations on a number line and to create number sentences representing the operations. There are more instructions on the right side of the Java applet.
Author(s): No creator set

The Place Value Number Line - Virtual Manipulative
A number line is a common representation of integers used to teach concepts of positive and negative numbers, zero, place-value, and arithmetic operations. The Place Value Number Line manipulative is designed to introduce, practice, and test skills in representing place value on a number line. There are instructions on the right side of the Java applet.
Author(s): No creator set

Rectangle Division - Virtual Manipulative
Use this virtual manipulate to explore and practice division using pictures.
The grid shows a big number divided by a little number. The big number is the total number of blue and red blocks. The little number is the height of the blue rectangle. The number of red blocks is the remainder left over when the big number is divided by the little number

Author(s): No creator set

Rectangle Multiplication - Virtual Manipulative
This virtual manipulative allows the user to visualize the product of two factors in three different ways: click on any of the options below the array to choose Grouping, Common, or Lattice. There are more directions on the right side of the Java applet
Author(s): No creator set

Factor Tree - A Virtual Manipulative
Factor numbers using a tree diagram. This manipulative allows you to construct factor trees (to the prime factors) for two numbers, and then from the prime factorization, you are asked to identify the Least Common Multiple (LCM) and the Greatest Common Factor (GCF) of the two given numbers.
There are more instructions to the right of the manipulative.

Author(s): No creator set

Spinners - Virtual Manipulative
This virtual manipulative can be used to teach about chance and random choices. You may:

-Spin the spinner
-Change spinner regions (Name, Color, and Size)
-Record results from multiple spins
There are more directions on the right side of the Java applet.

Author(s): No creator set

Towers of Hanoi - A Virtual Manipulative
The goal of the towers of Hanoi problem is to move a stack of disks from one peg to another in as few a moves as possible. The rules are:

-You may move only one disk at a time.
-You may not stack larger disks on top of smaller disks.
There are more instructions to the right of the manipulative.

Author(s): No creator set

Coin Problem - A Virtual Manipulative
The goal of this problem is to use the balance scale to compare coin weights in order to discover which of the coins is counterfeit. After familiarizing yourself with the problem, see if you can discover the conterfeit coin in as few weighings as possible. There are more instructions to the right of the manipulative.
Author(s): No creator set

'Let's Make a Deal' - A Virtual Probability Manipulative
This probability game is an electronic version of the old TV game show Let's Make a Deal, hosted by Monty Hall.
Behind one of the doors is a grand prize, the other two doors lead to some real losers. To play the game, select a door by clicking on it. "Monty" then reveals what is behind one of the two doors that you didn't open. You are then given the option to stick with your original selection or switch to the other door.
The game can be played repeatedly with the results updated on

Author(s): No creator set

Eric Whitacre's Virtual Choir and Backgound Story - CTV Toronto
Eric Whitacre & Scott Haines created a "Virtual Choir" on YouTube with 185 voices. This is a background story from CTV News Toronto & cnn.com. (02:16)
Author(s): No creator set

Eric Whitacre's Virtual Choir - 'Sleep'
Slow squeezed for maximum freshness, this is Eric Whitacre's "Sleep" performed by Eric Whitacre's Virtual Choir. This video features a hundred and more voices from around the world in a virtual choir. Whitacre is an American composer of choral, wind, and electronic music.
Author(s): No creator set

Eric Whitacre's Ground-Breaking Virtual Choir - 'Lux Aurumque'
This video features a hundred and more voices from around the world in a virtual choir. Whitacre is an American composer of choral, wind, and electronic music.
PRODUCED AND MANAGED BY: Scott Haines COMPOSED AND CONDUCTED BY: Eric Whitacre
Representing 12 Countries: Austria, Argentina, Canada, Germany, Ireland, New, Zealand, The Philippines
Singapore, Spain, Sweden, United Kingdom, United States of America

Author(s): No creator set

Algebra Tiles - A Virtual Manipulatives
Click on any of the buttons below the workspace to add a tile to the workspace. Drag the tile to the desired location on the workspace. Dragging a tile to the left or bottom axes will make it a factor of a product you are representing.
Rotate tiles
Move your mouse over the corner of a tile. A round dot will appear that can be used to rotate the tile by moving the mouse in a circular motion. When you release the mouse

Author(s): No creator set

Fifteen Puzzle - A Virtual Manipulative
The goal of this puzzle is to rearrange the fifteen numbered tiles to make a particular pattern.
There are fifteen numbered tiles and one blank space. The tiles are moved around by clicking on a tile next to the blank space (with one edge next to the blank) to slide it into the blank spot.

Author(s): No creator set

Pentominoes - A Virtual Manipulative
Add a pentomino to the workspace
Click on the button of the shape you want. You can move a pentomino by clicking and dragging it to a new location. When you place a pentomino next to another one, their edges will snap together.
Rotate
Click on the corner of the pentomino. Hold down the mouse button and move the mouse in a circular motion to rotate the pentomino. Then release the mouse button.

Author(s): No creator set