Here are a bunch of helpful links that may come in handy if you're struggling in math, or just need a little more information!
Free Online Calculators http://www.calculateforfree.com/
TI-83 Emulator (an online calculator) http://www.ticalc.org/archives/files/fileinfo/84/8442.html
Purple Math (explains tough concepts in easier terms) http://www.purplemath.com
Lots of Graphic Organizers for all kinds of math concepts http://www.sw-georgia.resa.k12.ga.us/Math.html
Some review videos for Geometry and lower http://www.mathplayground.com/mathvideos.html
Other Math Videos http://www.mathvids.com/http://www.mathtv.com/
GREAT MATH SITE WITH VIDEOS http://www.onlinemathlearning.com/index.html
Fun Math Games and Videos http://hoodamath.com
Online Manipulatives Website http://www.glencoe.com/sites/common_assets/mathematics/ebook_assets/vmf/VMF-Interface.html
PSAT Math Practice
With Calculator collegereadiness.collegeboard.org/sample-questions/math/calculator-permitted/1
Without Calculator collegereadiness.collegeboard.org/sample-questions/math/calculator-not-permitted/1