In this 3rd-grade math lesson, students will explore the concept of perimeter by learning how to measure and calculate the distance around various geometric shapes. The lesson begins with an introduction to common shapes and a discussion about the meaning of perimeter. Through direct instruction, students will learn formulas for calculating the perimeter of squares, rectangles, and triangles.
Following this, students will engage in guided practice where they measure the sides of pre-cut shapes and work together to calculate their perimeters. In a hands-on activity, small groups will create custom shapes using string or yarn, measure their sides, and determine the total perimeter collaboratively.
To reinforce their understanding, students will complete a worksheet featuring various shapes to calculate their perimeters independently. The lesson concludes with a recap of key concepts and a discussion on finding shapes and calculating perimeters in their everyday environments. Differentiation strategies are included to ensure all learners can engage with the material effectively. Assessment will take place through worksheet completion and observation during group activities.