The Back Page: My Favorite Lesson
Back Page: My Favorite Lesson: Bridging Algebra and Calculus
Marla A. Sole; Edited by Jennifer Wexler and Roger Day
April 2014, Volume 107, Issue 8, Page 640
Algebra students learn to distinguish between an average and an instantaneous rate of change as they begin to develop an intuitive understanding of a concept that is usually first introduced in calculus.