
Change the number of sectors and increase or decrease their size to create any type of spinner. Then, conduct a probability experiment by spinning the spinner many times. How does the experimental probability compare with the theoretical probability?


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 tool allows you to learn about various geometric solids and their properties. You can manipulate and color each shape to explore the number of faces, edges, and vertices, and you can also use this tool to investigate the following question: For any polyhedron, what is the relationship between the number of faces, vertices, and edges? What other questions can this tool help you answer?


Love the Factor Game? You can play again other players from all over the world at Calculation Nation^{TM}, and online world of math strategy games. Create an account, log in, and challenge an opponent to Factor Dazzle!


This applet allows students to individually practice working with relationships among fractions and ways of combining fractions. For a two person version, of this applet, see the Fraction Track EExample.


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? 

The Product Game is a fun, interactive game that exercises your skill with factors and multiples. 

Bobbie Bear is planning a vacation and wants to know how many outfits can be made using different colored shirts and pants. 

Use this tool to strengthen understanding and computation of numerical expressions and equality. In understanding equality, on eof the first things students must realize is that equality is a relationship, not an operation. Many students view "=" as "find the answer." For these students, it is difficult to understand equations such as 11=4+7 or 3×5=17–2. 

Build up to algebraic thinking by exploring this balance tool using shapes of unknown weight. Challenge yourself to find the weight of each shape in one of six builtin sets or a random set. 

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. Using this interactive tool, you can practice arithmetic and algebraic skills, and investigate the important concept of equivalence.


Thinking about numbers using frames of 5 can be a helpful way to learn basic number facts. The four games that can be played with this applet help to develop counting and addition skills. 

Thinking about numbers using frames of 10 can be a helpful way to learn basic number facts. The four games that can be played with this applet help to develop counting and addition skills. 

By yourself, or against a friend, match whole numbers, shapes, fractions, or multiplication facts to equivalent representations. Practice with the clear panes or step up the challenge with the windows closed. How many socks can you win? 

Oh, no! Okta and his friends need help. Help rescue them by transporting them to a safe ocean. How fast can you transport the Oktas? Use your counting skills to save as many as you can before the timer runs out! 