Measurement Length and Perimeter - Perimeter on a Grid - Starter

In this engaging mathematics lesson tailored for Year 4 students during the Autumn term, the focus is on mastering the concept of perimeter as well as revising key arithmetic skills. The lesson starts with a 'Fluent in Four' revision segment, where students are challenged with subtraction problems, such as deducting eight lots of 50 from 932 and subtracting 300 from 471. These exercises are designed to sharpen their mental arithmetic and prepare them for the day's main topic.

The core activity revolves around identifying perimeters on a grid. Students are presented with various images labelled with letters and are instructed to write the letters corresponding to the images where the perimeter can be found. In addition to perimeter calculation, the lesson also incorporates geometry by asking students to identify which pictures contain angles. Furthermore, the lesson includes an array exercise where students must write four number sentences that the array represents, enhancing their understanding of multiplication and division through visual representation. This multifaceted approach not only reinforces their numerical skills but also encourages a deeper comprehension of shapes and their properties.