Package this access card with your textbook to give your students' access to OWL, the #1 online homework and tutorial system for chemistry. With OWL, you'll save time and help your students improve their grades. Developed by chemistry instructors for teaching chemistry, OWL includes powerful course management tools that make homework management a breeze, as well as advanced reporting and grade book features that save you time in grading homework and tracking student progress. With OWL, you can address your students' different learning styles through a wide range of assignment types, including tutorials, simulations, visualization exercises, and algorithmically generated homework questions with instant answer-specific feedback. OWL is the only system designed to support mastery learning, allowing students to work at their own pace until they understand each concept and skill. Each time a student tries a problem, OWL changes the chemicals and wording of the question, as well as the numbers, to ensure student mastery. OWL's multimedia eBook is integrated with each text's mastery exercises and includes links to rich interactive assets which may include self-check quizzes, video solutions or examples, active figures and animations, and more. OWL includes parameterized Mastery homework assignments correlated to sections in the text as well as parameterized end-of-chapter questions. Both activities encourage students to practice multiple questions of the same type with different chemicals, wording, and numbers to ensure their mastery of the underlying chemical concepts. Visit www.cengage.com/owl to learn more.