## Search Results

### 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.

### Funky Protractors

3-5
This lesson is based on the MTLT  article, “Funky Protractors for Exploring Angle Measures” by Hamilton L. Hardison. In this lesson, students recognize and justify the validity of a tool and differentiate angularity from nonangular features.

### 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.

### Make One (Face-to-Face)

3-5
This lesson is based on the MTLT article, “Playing with Fractions” by Juli K. Dixon, Treshonda Rutledge, Jennifer C. Caton, and Edward C. Nolan. In this lesson students model fractions with a fraction kit and reason about adding fractions with unlike denominators.

### Getting Positive About Integer Arithmetic

In this lesson, we share a series of tasks that can support students to order and compare signed numbers and develop multiple ways to reason productively about integer addition and subtraction.

### 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

### Using Number Talks to Compare Fractions

3-5

Based on an MTLT article, the authors implement a coordinated series of well-connected number talks that allow for students to make sense of a variety of strategies that provide “flexibility” in their mathematical reasoning when comparing fractions.