Daniel E. Flath & Andrew M. Gleason 
Applied Calculus [EPUB ebook] 

Interactive classrooms and well-crafted problems promote student learning. Since it’s inception, the hallmark of Applied Calculus is its innovative and engaging problems. The Calculus Consortium pioneered and incorporates the approach called the "Rule of Four." The Rule of Four, presents ideas graphically, numerically, symbolically, and verbally, thereby encouraging students with a variety of learning styles to deepen their understanding as they work through a wide variety of problem types.