This addition was custom-made to meet the needs of student studying pre-college mathematics as part of the efforts to provide students with the tools they need to be successful in this class we have highlighted are paying attention to instructors feature that appears in a number of problems sets these problems are now easier to find. We have updated most of the application problems and we have added QR codes to each section of the text, students can use their smart phones or tablets to scan the QR code for a section and the instructional videos for that section will appear on their smart device