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.

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### Joanna Papakonstantinou

Students create clever mathematical Valentine’s Day cards.

### Alessandra King

This department provides a space for current and past PK-12 teachers of mathematics to connect with other teachers of mathematics through their stories that lend personal and professional support.

### Lidia Gonzalez

This method using the area of regular polygons inscribed in circles to approximate a value for pi is similar to the method used by Archimedes using circumferences.

### Seán P. Madden, Olli (Sara) Hume, and Jacqueline S. Booton

Mathematics and technology serve the health sciences as demonstrated in this article,cowritten by one of our calculus students. Creating a lesson based on dosing an antibioticallows teachers and students to see the immediate value of high school calculus and technology.

### 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.

May 2020 For the Love of Mathematics Jokes

### 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.

### Zachary A. Stepp

“It's a YouTube World” (Schaffhauser, 2017), and educators are using digital tools to enhance student learning now more than ever before. The research question scholars need to explore is “what makes an effective instructional video?”.