As your country's top spy, you must infiltrate the headquarters of the evil syndicate, find the secret control panel, and deactivate their death ray. But your reconnaissance team is spotty, and you have only limited information about the...

In this riddle, some endangered fish species are being transported by water and a storm causes them to be thrown overboard. Your task is to devise a way to rescue them. The video provides some pointers on how to approach the problem....

A Writer's Workshop activity in which learners uncover the riddle of a Sausage Story, learn to identify the sausage sentence within the story, and finally write their own Sausage Stories along with hints for their readers to figure out...

In this lesson, students discover the riddle of sausage stories and learn to original write sausage sentences and then move up to sausage stories. Read and discover the riddle!

Professor Fukano, the famous scientist, has embarked on a new challenge - piloting around the world in a plane of his own design. There's just one problem: there's not enough fuel to complete the journey. Luckily, there are two other...

This site from NASA provides an interestinnng approach to telescopes. "Almost all telescopes nowadays use mirrors, not lenses, to gather and focus the light from celestial objects. We have just seen, though, that mirrors reverse the...

One hundred green-eyed logicians have been imprisoned on an island by a mad dictator. Their only hope for freedom lies in the answer to one famously difficult logic puzzle. Can you solve it? Alex Gendler walks us through this green-eyed...

In this interactive, students use clues and logic to plot the location of aquatic animals on a Cartesian graph that represents the four cardinal directions. The three riddles in the interactive, including one that requires students to...

The Why? Files article posted on April 17, 2003 explores the puzzling riddle into whether or not elephants can really run.