http://www.hotmath.com
hotmath.com is free to CPM students--all the CPM resources are available to anyone who goes to the website. Students can get hints on problems and/or step by step solutions to any homework problem (not to worry, no classwork problems are made available)
 

INTERACTIVE MATHEMATICS (Internet connection required):  Math students at LPHS have access to a very good mathematics software program called INTERACTIVE MATHEMATICS.  It is an interactive, Internet only, instructional program covering Pre-Algebra and Algebra-1.  There are five CD's consisting of the INTERACTIVE MATHEMATICS Client software and the four data CD's.  These disks and installation instructions may be obtained from the student store.  There is a $15 deposit required.  The deposit will be refunded when all the CD's are returned undamaged.  System requirements