Walker, Janet, and Michael Todd Edwards. “A Tale of Two Sliders”. Mathematics Teacher: Learning and Teaching PK-12, vol. 111, no. 1, 2017, pp. 66-69, https://doi.org/10.5951/mathteacher.111.1.0066.
Walker, J., & Edwards, M. T. (2017). A Tale of Two Sliders. Mathematics Teacher: Learning and Teaching PK-12, 111(1), 66-69. https://doi.org/10.5951/mathteacher.111.1.0066
Walker J, Edwards MT. A Tale of Two Sliders. Mathematics Teacher: Learning and Teaching PK-12. 2017;111(1):66-9.