Perimeter and Area - Perimeter on a Grid - Presentation

In a mathematics lesson centred around understanding perimeter, students are invited to explore this concept through a series of engaging grid-based activities. The lesson begins with a discussion on what information is necessary when using grids to determine the perimeter of various shapes. As the class progresses, students are tasked with calculating the perimeters of different shapes presented on a grid, where each square represents a 1cm by 1cm area. These activities challenge the students to not only calculate the perimeter but also to consider how changing the shape can affect the perimeter, asking them to create new shapes with specific perimeter requirements, such as being double or half the size of a given shape.

Further activities include drawing rectilinear shapes with equal perimeters on squared paper, prompting students to compare and contrast the properties of these shapes. They are encouraged to think critically about real-life applications of perimeter, such as designing a patio with a set number of paving stones. The lesson also delves into reasoning skills, where students order shapes by perimeter length and explore the concept of perimeter in the context of letter shapes. The lesson concludes with independent work that reinforces the understanding of perimeter through practical examples and problem-solving exercises. Students are prompted to reflect on the concept of perimeter, how to measure it, and its practical significance in everyday situations.