## Lesson Highlights

## Newest Lessons

### Pythagorean Theorem with Technology

In this lesson, students will extend the Pythagorean theorem by investigating the relationship between the areas generated by the lengths of the sides of a right triangle, investigate whether the Pythagorean theorem still holds if the shapes are not squares, and investigate whether the Pythagorean theorem still holds if the shapes are not regular.

### Math Metaphors

### Crack the Code: Algebraic Generalizing with Manipulatives

### Using Number Talks to Compare Fractions

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.

### Frustration: Analyzing a Card Game with Probability

*Frustration*.