Here are the notes from  1st period and also homework help and answers for the first 4 questions :) ENJOY!

Also here are some cool links for estimating ... :)

Guess the  number game

http://www.oswego.org/ocsd-web/games/Estimate/estimate.html

And another
http://pbskids.org/cyberchase/games/ballparkestimation/ballparkestimation.html