History of Valentine's Day
Description: Why do we celebrate Valentine's Day on February 14th and where do the holiday customs come from?
Category: Valentine's Day Videos
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
Learn about area and perimeter in this online math simulation game. Find the area of a shape by counting unit squares. Describe the relationship between area and perimeter. Build shapes with a given area and/or perimeter. Find the area of an irregular shape by decomposing into smaller, regular shapes (e.g., rectangles, triangles, squares). Determine the scale factor of similar shapes. Generalize how area and perimeter change when scaling shapes.