description: Students of all ages can create multimedia presentations using Microsoft PowerPoint. Teach them how using this fun-filled, online tutorial.
title: Virtual Manipulatives
description: A digital library containing Java applets and activities for K-12 mathematics
title: Welcome to Knowitall.org
title: Welcome to Flickr - Photo Sharing
description: Flickr is almost certainly the best online photo management and sharing application in the world. Show off your favorite photos and videos to the world, securely and privately show content to your friends and family, or blog the photos and videos you take with a cameraphone.