First Year Calculus"We own the Calculus." This was a sentiment proclaimed by students who took calculus at the University of Texas as it was taught by Professor R. L. Moore. This book captures the method which facilitates the teaching of students through Inquiry Based Learning (IBL). It is based on notes taken by the author as a student of Dr. Moore at the University of Texas, Austin, in 1955. It includes Dr. Moore's collection of seminal "problems that teach" designed