An interactive simulation that teaches about gravitational force, Newton's Third Law, and force pairs by varying properties affect the gravitational force exerted between two objects. This simulation can either be downloaded or played online and includes handouts, lesson plans, and additional materials.

Stretch and compress springs to explore the relationships between force, spring constant, displacement, and potential energy. Investigate what happens when two springs are connected in series and parallel.

An interactive simulation that teaches about force and potential energy by changing variables to stretch and compress springs. This simulation can either be downloaded or played online and includes handouts, lesson plans, and additional materials.

Play hockey with electric charges in this interactive electric hockey simulation. Place charges on the ice, then hit start to try to get the puck in the goal. As the game is being played, view the electric field, and trace the puck's motion.

Are all atoms of an element the same? How can you tell one isotope from another? Use the sim to learn about isotopes and how abundance relates to the average atomic mass of an element.

Are all atoms of an element the same? How can you tell one isotope from another? Use the sim to learn about isotopes and how abundance relates to the average atomic mass of an element.

Make sparks fly with John Travoltage. Explore how charging Johnnie up and moving his hand changes how he gets shocked!

Manipulate a ladybug's position, velocity, and acceleration, and see how the vectors change in this interactive simulation. Software download is necessary.

Learn about position, velocity, and acceleration vectors by moving the ladybug. Set the position, velocity, or acceleration, and see how the vectors change.

Join the ladybug in an exploration of rotational motion. Rotate the merry-go-round to change its angle, or choose a constant angular velocity or angular acceleration. Explore how circular motion relates to the bug's x,y position, velocity, and acceleration using vectors or graphs.

Create a laser by pumping the chamber with a photon beam. Manage the energy states of the laser's atoms to control its output.

Learn about absorption and emission by creating a laser. Pump the chamber with a photon beam, and manipulate the energy states of the laser's atoms to control its output.

Create your own scatter plot or use real-world data and try to fit a line to it. Explore how individual data points affect the correlation coefficient and best-fit line.

Ever wonder how a compass worked to point you to the Arctic? Explore the interactions between a compass and bar magnet, and then add the earth and find the surprising answer.

Explore the interactions between a compass and bar magnet. Discover how to use a battery and wire to make a magnet.

An interactive simulation that teaches about place value, addition, and subtraction by adding, breaking apart, and combining numbers by making tens and focusing on place value. This simulation can either be downloaded or played online and includes handouts, lesson plans, and additional materials.

An interactive simulation that teaches about springs, Hooke's Law, and conservation of energy observing changes in kinetic, potential, and thermal energy by adjusting the stiffness and damping of springs holding various masses. This simulation can either be downloaded or played online and includes handouts, lesson plans, and additional materials.

Learn about position, velocity, and acceleration in the "Arena of Pain." Use the green arrow to move the ball. Add more walls to the arena to make the game more difficult. Try to make a goal as fast as you can.