James Stewart's Calculus series provides students with the strongest foundation for a STEM future by building problem-solving skills and developing critical thinking and conceptual understanding. Selected and mentored by Stewart, Daniel Clegg and Saleem Watson continue his precision, accuracy, and outstanding examples and problem sets. Careful refinements such as scaffolded exercises that build student confidence make the 9th edition an even more effective learning and teaching tool. WebAssign reinforces concepts and enables students to apply them with new Proof Problems, Expanded Problems, and Explore It interactive learning modules. Showing that Calculus is both practical and beautiful, the Stewart approach and WebAssign resources enhance understanding and build confidence for millions of students worldwide.