Know What No One Else Knows

Activity 1: Mysterious Words from the Past

What exactly is a flash in the pan, and what's so bad about sailing close to the wind? There are forgotten meanings behind these common phrases.

Activity 2: Recaptcha, Where Humans are Smarter than Computers

In this activity, you may be able to crack a code that computers haven't: written English.

Activity 3: Secret Codes

Make up your own secret codes and see if others can break them.

Activity 4: Same Difference

Things may not be what they seem in these pairs of photos. See if you can spot the differences between them.

Author(s), Presenter(s): 
Trudy Dunham and Jay Staker
Year published or updated: 
2008