We've been doing Estimation 180 for the past few weeks in my intervention class.  The kids love it.  They are climbing over each other to get to be the one who types in the guesses.  Today, my 1st period clown won the race to the front and started typing in his guesses.

Name: Doctor Santiago
Estimate: 4000 pieces of paper
Confidence: 5
Context clues: I'm a doctor

Followed by round 2:
Name: Doctor Proffeser [sic]

Student #2: OBVIOUSLY YOU DIDN'T GET YOUR PhD IN SPELLING, DOCTOR!

(My heart melted.  One child knew how to spell <3)