Helen M. Doerr, Donna J. Meehan, and AnnMarie H. O'Neil
Abstract: Building on prior knowledge of slope, this approach helps students develop the ability to approximate and interpret rates of change and lays a conceptual foundation for calculus.
Journal: Mathematics Teacher, Vol. 105, No. 6, February 2012
URL:
http://www.jstor.org/stable/10.5951/mathteacher.105.6.0432