Classy

Students design levers to solve problems and demonstate understanding of them by using LEGO Dacta kits to make three classes of levers. Using nuts and nutcrackers, they note the relationship betweeen the nuts and the fulcrums (bends in...

The arm lizard, also known as the Brachiosaurus, is one of the largest known land animals to have ever roamed the earth. Read about their attributes and behaviors in a news article adapted by Newsela.

If your favorite spiky dinosaur is the Stegosaurus, then this is the passage for you. Read about the roof lizard and the lifestyle of this largest known plated dinosaur that roamed North America during the Jurassic period. 

The Tyrannosaurus rex may have met its match with the carnivorous Allosaurus, otherwise known as the other lizard. The Allosaurus, however, walked Earth's lands much later than the T.rex. Read about this flesh-eating dinosaur and its...

Movies have depicted the Velociraptor as a large, vicious dinosaur. Although they may have been vicious, Velociraptors were much smaller in size, allowing them to move fast and catch their prey. Read to find out more about this complex...

The Apatasaurus, which means deceptive lizard, roamed the earth during the end of the Jurassic period and during the late Cretaceous period. Read more about this massive dinosaur and its lifestyle behaviors.

I bet you've never heard of this duck-billed dinosaur. Weighing up to 20 tons, the Shantungosaurus was a herbivore that stood on its hind legs. Read about this late Cretaceous dinosaur that roamed Asia's lands many years ago.

Don't confuse this dinosaur with the Tyrannosaurus rex. Even though they roamed the earth during the late Jurassic period, the Ceratosaurus was much different than the T. rex. Read more about this ferocious meat-eating dinosaur and its...

When the Protoceratops, also known as the first horned lizard, was initially discovered scientists realized dinosaurs laid eggs. Read about this short but strong dinosaur that roamed Asia during the late Cretaceous period.

The Iguanadon, which means iguana tooth, was a large herbivorous dinosaur that roamed Earth over 100 million years ago. Read about this creature's lifestyle, the structure of its body, what it ate, and when and where it lived.