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PowerOfAPoint ICON

Power of a Point


Use this tool to investigate what happens when point P is moved to various points within, on, and outside the circle. What, if any, relationships can you identify among the segments and radius?

EulersLine ICON

Euler's Line

Discover and explore Euler's Line.
March 2021 Tiny Cover

Visualizing Complex Roots of a Quadratic Equation

This lesson is based on the MTLT article, Visualizing Complex Roots of a Quadratic Equation by Thomas Edwards, S. Asli Özgün-Koca, and Kenneth Chelst. In this lesson students use various tools to discover the geometric relationship between complex roots of a quadratic equation and the graph of the associated quadratic function.
Jan2021 Tiny Cover

Pythagoras, PVC Pipes, and Pianos

This lesson is based on the MTLT article, "Pythagoras, PVC Pipes, and Pianos by Danielle Divis. The lesson uses a music-related activity to engage students in using and connecting multiple representations of exponential growth. 

Math Metaphors

6-8, 9-12
In this lesson, students create metaphors to capture and explore their experiences as learners of mathematics with respect to their identity, sense of agency, and emotions.