What's the first thing to come to your mind?

Fox

Glove

Box

Box, Box
(you have to say it three times or they might not come in!)

Box, Box, Box

OK - just don't try it with "Beetlejuice"!

Failure

One way to learn!

Teaching

“Those who can, do; those who can't, teach.” (George Bernard Shaw)
Guaranteed to annoy any teacher when you say it.