## Fraction Games

To play this one-person game well, students need to work with equivalent fractions, and be able to add and subtract fractions. Don't forget to turn the sound on!
http://illuminations.nctm.org/ActivityDetail.aspx?ID=18

Here is a neat two-person version of the game.
http://standards.nctm.org/document/eexamples/chap5/5.1/

And here is the above game without all of the instructions:
http://standards.nctm.org/document/eexamples/chap5/5.1/#applet

## Integer Subtraction with Colour Chips

This virtual manipulative uses plus-minus chips to demonstrate adding positive and negative values.
http://nlvm.usu.edu/en/nav/frames_asid_162_g_3_t_1.html?open=instruction...

## Circle 99

The goal of this puzzle is to put three numbers inside of each circle so that they add up to 99.
http://nlvm.usu.edu/en/nav/frames_asid_269_g_3_t_1.html?open=instruction...

## Circle 3

The goal of this puzzle is to put three decimal numbers inside of each circle so that they add up to 3.
http://nlvm.usu.edu/en/nav/frames_asid_187_g_3_t_1.html?open=instruction...

## Circle 0

The goal of this puzzle is to put three numbers inside of each circle so that they add up to 0.
http://nlvm.usu.edu/en/nav/frames_asid_122_g_3_t_1.html?open=instruction...

## Integer Additon with Colour Chips

This J virtual manipulative uses plus-minus chips to demonstrate adding positive and negative values.
http://nlvm.usu.edu/en/nav/frames_asid_161_g_1_t_1.html?open=instruction...

## Circle 99

The goal of this Java puzzle is to put three numbers inside of each circle so that they add up to 99.
http://nlvm.usu.edu/en/nav/frames_asid_269_g_1_t_1.html?open=instruction...

## Rectangular Multiplication of Integers

This virtual manipulative allows the user to visualize the product of two integers.
http://nlvm.usu.edu/en/nav/frames_asid_322_g_1_t_1.html?open=instruction...

## Rectangle Multiplication

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.
http://nlvm.usu.edu/en/nav/frames_asid_192_g_1_t_1.html?open=instruction...

## Part, Percent, Whole

A visual way to teach percent operations is the 'TopHat' - which shows the relationship between the Part, the Percent and the Whole. This Java applet uses proportions to set up and solve percent problems.
http://nlvm.usu.edu/en/nav/frames_asid_160_g_1_t_1.html?open=activities&...