What do a zoo and a farm have in common? Second graders read about each place, and compare and contrast the details using two multiple choice questions.

Gardening is fun, no matter what you're growing. A reading comprehension activity encourages learners to compare and contrast two gardens that grow different items.

Biology learners read about selective breeding in chickens and how it has produced high-yield meat specimens and rapid egg-layers. The unpleasant effects of artificial selection are explored, as well as options to supporting this...

Which came first: the chicken or the egg? One might ask the same question about potential and kinetic energy. Make observations while you watch the video below. Think about what scientific conclusion you could make from your...

It's a question that has perplexed everyone from the ancient Greeks to modern scholars. Which came first, the chicken or the egg? Take a crack at this curious conundrum. [3:31]