Every book that has an Accelerated Reading Practice Quiz is given a point value. Points are computed based on the difficulty of the book (ATOS readability level) and the length of the book (number of words). For example, the Horrid Henry books, which are about 5,135 words long and have an average ATOS book level of 3.3, are 1.0-point books. Harry Potter and The Philosopher’s Stone is 77,325 words long and has an average ATOS book level of 6.0, is a 12-point book. Children earn points, or a portion of a book’s points, depending on how well they do on the Reading Practice Quiz. For example, a child who takes a 5-question quiz on a book worth 1 point will earn 1 point for 5 correct answers (100%), 0.8 point for 4 correct answers (80%), etc. A child who reads a book worth 5 points and takes a 10-question quiz will earn 5 points for 10 correct answers (100%), 4.5 points for 9 correct answers (90%), etc. For quizzes with 3, 5, or 10 questions, a child needs to pass a quiz with a score of 60% or higher to earn points. For quizzes with 20 questions, a child needs to pass with a score of 70% or higher to earn points. There are over 160,000 Accelerated Reader quizzes available!