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## Escape Room Math: Luna's Lines

An escape room can be a great way for students to apply and practice mathematics they have learned. This article describes the development and implementation of a mathematical escape room with important principles to incorporate in escape rooms to help students persevere in problem solving.

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## Seeing Algebraic Structure: The Rubik's Cube

Few high school students associate mathematics with playfulness. In this paper, we offer a series of lessons focused on the underlying algebraic structures of the Rubik's Cube. The Rubik's Cube offers students an interesting space to enjoy the playful side of mathematics, while appreciating mathematics otherwise lost in routine experiences.

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## Planning Questions to Help Surface Understanding

Dude Perfect has one of the most popular YouTube channels in the United States. An example mathematical activity connected to a Dude Perfect video is described along with the incorporation of assessing and advancing questions.

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## Can We Use a Mirror to Find Height?

My favorite lesson is based on a problem my geometry students encounter. When we study similar triangles, students use indirect measurement to determine the height of an object.

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## Solving and Graphing Quadratics with Symmetry and Transformations

One of the central components of high school algebra is the study of quadratic functions and equations. The Common Core State Standards (CCSSI 2010) for Mathematics states that students should learn to solve quadratic equations through a variety of methods (CCSSM A-REI.4b) and use the information learned from those methods to sketch the graphs of quadratic (and other polynomial) functions (CCSSM A-APR.3). More specifically, students learn to graph a quadratic function by doing some combination of the following:

• Locating its zeros (x-intercepts)
• Locating its y-intercept
• Locating its vertex and axis of symmetry
• Plotting additional points, as needed

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## What Does It Mean to Do Something Randomly?

Similar assumptions seem to give rise to conflicting answers when students approach probability questions differently.

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## Conic Connections with Polar Functions

Encourage investigation of the conic-section attributes of focus, eccentricity, directrix, and semi-latus rectum using polar coordinates and projective geometry.

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## Creating a Hybrid Immersive Mathematics Experience

With this professional development program, teachers work with colleagues and experience a manner of teaching that embeds habits of mind.

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## Happy Families, Continued

Explore the relationship between families of quadratic expressions factorable over the integers and Pythagorean triples.

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## Correlation Revelation: The Search for Meaning in Pearson's Coefficient

Lesson planning leads to a deeper consideration of what it means to study and learn mathematics.