Scientific Calculator (for calculating square roots)
Online calculators
My Favorites:
http://www.brightstorm.com/math
http://www.khanacademy.org/
http://mathvids.com/topic/mathhelp/8-pre-algebra
LIBRARIES OF RESOURCES
Awesome Library of Math Resources Awesome Library of Math Resources - Huge, huge, huge, find projects, games, simulations, lesson plans, flash cards worksheets, and worksheets generators. Awesome Library of Math Resources
Kings List of Online Math Activities - Hands on interactive sites to use with kids, easy to use.
Knot a Braid of Links - Amazing site allows you to search or browse math websites recommended by the Canadian Mathematical Society.
Math Forum at Drexel - Leading center for math education on the internet.
Math Resources Math Resources selected by Kathy Schrock at Discovery School. High quality..
SCORE Math Resources - Endless lists of resources for math.
Webmath