What is Gravity?
Description: Why aren't we floating right now? Gravity, of course! But it's not that simple...
Category: Janet's Planet
Note: This video streams on an HTML5 player. It runs on Chrome, Firefox, Opera, Safari or Internet Explorer 9 or higher. It is also optimized for iOS devices, including iPad, iPod, and iPhone.
Game Spotlight
This game combines the classic game of tic tac toe with math! Solve each subtraction problem to earn a square on the board. Play a game of tic tac toe against the computer or a friend.
