A resource fit for a queen. Scholars recognize and continue a pattern in towers people are building for a queen. They write and use an algebraic expression for the number of tiles in the towers.

Fireflies are more than just mobile twinkle lights. An online interactive lesson teaches individuals about the light patterns fireflies use to communicate with each other. After they practice the patterns themselves, they could be...

Can you read a map? Scholars use an interactive technology tool to analyze maps of various kinds to gather evidence and data to better understand their meanings and usefulness. Using newly obtained knowledge, they form an interpretation...

In this circuits instructional activity, students answer 24 questions about parallel DC circuits including finding the current drawn by resistors, the total resistance, and the voltage impressed across each resistor in the circuit....

In this electrical instructional activity, students answer a series of 27 open-ended questions pertaining to DC circuits by analyzing electrical schematics. This instructional activity is printable and there are on-line answers to the...

The Number Cracker needs you to help find a secret code by identifying the missing number in a series.

Step through the generation of Sierpinski's Carpet, a fractal made from subdividing a square into nine smaller squares and cutting the middle one out. Explore number patterns in sequences and geometric properties of fractals.

A fun puzzler to get any mind thinking logically! Try many levels of puzzles using the following rules: "Enter digits from 1 to 9 into the blank spaces. Every row must contain one of each digit. So must every column, as must every 3x3...

Click on different shapes to extend the pattern. Three levels of difficulty.

This site offers many uses for Sudoku, including free online puzzles, free puzzles for school publication, and it gives the history of Sudoku.