Defining a quadratic function through the slopes of its secant/tangent lines leads to the fundamental theorem of calculus (FTC) and an alternative way of understanding integration.
Kuo-Liang Chang and Ellen Lehet
Paul Naanou and Sam Rhodes
Students grapple with the problem of finding the volume of two different folds of a traditional Levantine dessert using either geometry or calculus.
Christopher Harrow and Ms. Nurfatimah Merchant
Transferring fundamental concepts across contexts is difficult, even when deep similarities exist. This article leverages Desmos-enhanced visualizations to unify conceptual understanding of the behavior of sinusoidal function graphs through envelope curve analogies across Cartesian and polar coordinate systems.