Perimeter and Area - Perimeter of Rectilinear Shapes - Worksheet

In this comprehensive lesson, Year 6 pupils will delve into measuring and calculating the perimeter of various rectilinear figures, including squares. The objective is to ensure that students can determine perimeters in both centimetres and metres, enhancing their understanding of length measurements. To facilitate this learning, differentiated worksheets and teaching slides will be utilised as key resources. The vocabulary for the session includes terms such as 'centimetres', 'metres', 'perimeter', and 'rectilinear'. The lesson encourages students to move away from relying on squared paper, instead using addition and subtraction to find missing sides of shapes. Teachers might employ part-whole models to aid children in comprehending how to work out these missing lengths. Students are prompted to label each side of the shape and to check off sides as they add them up to calculate the total perimeter.

Throughout the lesson, key questions guide the pupils' understanding of why opposite sides are significant in perimeter calculations and how to determine unknown lengths using given measurements. For example, when one side of a rectilinear shape is known to be 10 cm and the opposite side comprises two lengths, with one being 3 cm, students must figure out the missing length. The lesson also poses questions about the maximum and minimum number of sides a rectilinear shape can have if its perimeter is a given measurement. To deepen their reasoning and problem-solving skills, children are presented with shapes made from combined rectangles and tasked with calculating the overall perimeter. These activities are tiered to cater to different levels of proficiency, from 'Working Towards' to 'Working Within', and up to 'Greater Depth', providing a structured progression for all learners.