The digestive system is a group of organs (from the mouth to the rectum) that processes food so the body can use it. The following sites explain the process with illustrations and animations for all age groups.
Human anatomy is the study of the human body. The word "anatomy" derives from Greek words meaning "to cut up" because early scientists studied anatomy through dissections.
Ever wonder why the northern and summer hemispheres have opposite seasons? Or why the longest day of the year is considered the start of summer?
Pennies, nickels, dimes and quarters: can you count them? Can you give change? Money-counting skills require practice, and these online money-counting games make it fun.
"How much money is here?" Aplusmath's interactive money-counting flash cards present one problem at a time, using dollar bills, quarters, dimes, nickels and pennies.
"Can you choose coins that add up to an amount of money?" As coins fall from the top of the screen, click on them to reach your goal.
This time you earn money in a virtual piggy bank by calculating change.
Count the various coins, and enter your answer on the calculator using your keyboard or your mouse.
Vary the difficulty of this exercise by selecting how many coins and bills to count (three to eight) and the largest denomination you want to include (from a quarter up to a twenty-dollar bill.
Optics, the science of light, is studied by both scientists and engineers. It includes defining light, learning how it is produced, how it travels, and how it is measured. Today's picks run the gamut from simple science for K-3 students, to sites appropri
Bad science (also known as junk science, science myths or science misconceptions) consists of common misconceptions passed on from parents, teachers and inaccurate text books. As American scientist Stephen Jay Gould said, "The most erroneous stories are t
Hands-on science experiments at home or in the classroom are a fun way to engage kids and get them excited about science. Today's sites house hundreds of easy experiments that can be done with supplies that you probably have around the house, or can get a
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