Okta challenges you to a duel! That crazy octopus wants to play you in a game where the first person to choose cards with a specified sum wins. You can choose how many cards, what types of numbers, ...

A tessellation is a repeating pattern of polygons that covers a plane with no gaps or overlaps. What kind of tessellations can you make out of regular polygons? What shapes tessellate? If shapes can ...

The Product Game is a fun, interactive game that exercises your skill with factors and multiples. This Product Game Investigation was adapted with permission and guidance from Prime Time: Factors and ...

This activity allows the user to enter a set of data, plot the data on a coordinate grid, and determine the equation for a line of best fit.

This activity allows the user to enter a set of data, plot the data on a coordinate grid, and determine the equation for a line of best fit.

A tessellation is a repeating pattern of polygons that covers a plane with no gaps or overlaps. What kind of tessellations can you make out of regular polygons? What shapes tessellate? If shapes can ...

Use tiles to represent variables and constants, learn how to represent and solve algebra problem. Solve equations, substitute in variable expressions, and expand and factor. Flip tiles, remove zero ...

Learn how to count, collect, exchange, and make change for coins. The coin tiles help you count as you learn the value of each coin. How many of the games can you master? For all games, you can start ...

This interactive pan balance allows numeric or algebraic expressions to be entered and compared. You can "weigh" the expressions you want to compare by entering them on either side of the balance.