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### Geometric Reflections

6-8

This lesson is based on the *MTLT*article, “Geometric Reflections: Why Should They Not Be Just a Flip?” by Dawn Teuscher, Shannon Dingman, Travis Olson, and Lisa Kasmer. In this lesson, students reflect points and figures to formulate a mathematical definition of reflection. Then, they identify and justify whether points and figures are reflections!

### Conditional Reasoning Online with Mastermind

6-8

This lesson is based on the *MTLT*article, “Conditional Reasoning Online with Mastermind” by Sean P. Yee, George J. Roy, and LuAnn Graul. This lesson engages students in using deductive and inductive reasoning as they play a game called Mastermind.

### Model Application Activity (MAA)

3-5, 6-8

This lesson is based on the *MTLT*article, “Developing Statistical Modeling with Helicopters” by Katie Makar, Sue Allmond, Helen M. Doerr, and Robert C. delMas. In this lesson, students design a way to collect evidence of flight durations based on two types of paper helicopters.

### Model Exploration Activity (MXA)

3-5, 6-8

This lesson is based on the *MTLT*article, “Developing Statistical Modeling with Helicopters” by Katie Makar, Sue Allmond, Helen M. Doerr, and Robert C. delMas. This lesson engages students in a model exploration activity to explore dot plots using a paper helicopter investigation.

### Model Eliciting Activity (MEA)

3-5, 6-8

This lesson is based on the *MTLT*article, “Developing Statistical Modeling with Helicopters” by Katie Makar, Sue Allmond, Helen M. Doerr, and Robert C. delMas. This lesson engages students in a model eliciting activity to investigate how long a paper helicopter stays in the air.

### Neutralizing Reactions and Inverses

6-8

In this lesson, students will integrate science and math, exploring how neutralization reactions can help us understand that the sum of any number and its additive inverse is zero. ### Frustration: Analyzing a Card Game with Probability

6-8

This lesson engages students in the joy of mathematical inquiry through a game, while building number sense, understanding of uncertainty, statistical reasoning, and discourse skills. Students will explore the ideas of experimental and conditional probability through the card game, *Frustration*.