Supply lists can be found in each home page for the class, click on the appropriate tab.
Email Mr. Christensen email@example.com
Need some graph paper for an assignment? Click here http://mathbits.com/MathBits/StudentResources/GraphPaper/GraphPaper.htm
Need some guidance with your homework?
http://hotmath.com/ (there is a subscription fee though)
https://www.slader.com/ (I cannot vouch for the accuracy of this website)