Renaissance Learning

"AR is a computer program that helps teachers and librarians manage and monitor children's independent reading practice.  Your child picks a book at his own level and reads it as his own pace.  When finished, your child takes a short quiz on the computer. (Passing the quiz is an indication that your child understood what was read.)  AR gives children, teachers, and librarians feedback based on the quiz results, which the teacher then uses to help your child set goals and direct ongoing reading practice."  from Renaissance Learning