Online Leveled Informational Text Reading and Adaptive Math Problems

Front Row Ed - Free for teachers with an option for schools and districts to purchase for more bells and whistles, but what you get to do for free is really good.
Math: Sign up your class and they take a pretest to find their level and they will begin a tailored, computerized, grade-level math program.  It is excellent for computer lab time, extra work or help for low students (includes has a Spanish option!).
ELA: You can assign students a large array of articles that include biographies, science, and social studies subjects.  Each article can be set at it's own grade-level for individual students and finishes with a writing component that will be sent to your computer to grade.
Did I mention, it's free?  An amazing tool for any teacher.