The graph below shows the progression of gold medalists' times for the 100-meter sprint since 1896. Use the zoom controls at the top right to get a closer look, and hover over the points to learn each year's result. While zoomed, click and drag the timeline to view later years.
Mark up websites, graphics, and photos, or start brainstorming on a blank canvas. Browse the web with your friends or make that conference call more productive than ever. No plug-ins, downloads, or firewall voodoo - it's all here, ready to go when you are. Browser-agnostic, user-friendly.
Connect your classroom to the world
Skype is a free and easy way for teachers to open up their classroom. Meet new people, talk to experts, share ideas and create amazing learning experiences with teachers from around the world.
Photo collages celebrate important events and themes in our lives. Pick a folder, press a button, and in a few minutes AutoCollage presents you with a unique memento to print or email to your family and friends.
Quiz that is simple, gives instant feedback and a final score. Note that students should not sign in to facebook or twitter to obtain their final score.
The head of a pin is about 2mm in diameter. Use this animation to compare the relative sizes of cells and organisms sitting on a pinhead. Nearly invisible without magnification, dust mites dwarf pollen grains and human cells. In turn, bacteria and viruses are even smaller.