Useful instructional videos for students who need another voice and/or extra help! Khan Academy
A graphing utility written by a high school teacher at Exeter. Sadly, it only works with Windows systems. It unzips into a folder c:\peanut\ It's great, and free! See the tutorial in the Downloads section. WInPlot
Mad Minute math problems
A terrific geometry/algebra program similar to Geometer's Sketchpad, but FREE! Can be downloaded or used online. Geogebra
Wolfram Mathworld Everything you ever wanted to know about math...
Centroids Abound! Check out this java version of Spirograph
As close to hotmath as you can get at this level of mathematics Wolfram Alpha
Graph Paper Boutique - Free graph paper for all your needs...just print! So many graphs, so little time!
Calculus Animations to aid understanding Calculus Animations
More Calculus Animations More Calculus Animations
Mad Minute multiplication
60 single digit solutions in 1 minutes
Fill in the multiplication table in 5 minutes
Single digit problems: 3 minutes
Challenging Basics: 3 minutes
Arithmetic and Algebraic worksheets
more algebraic and arithmetic worksheets
Knowledge is Power.