Addition and subtraction within 20 - Subtraction not crossing 10 - Planning

In this Year 1 Spring term lesson, focused on subtraction within 20 without crossing the 10 boundary, children are encouraged to reinforce their understanding of subtraction using practical and visual methods. The lesson begins with a recap of previous learning, where children discuss the subtraction symbol and the significance of zero in subtraction scenarios. They utilise part-whole models and practical equipment to explore number bonds within 20. The class then moves on to partner work, where they articulate their thought process in full sentences, enhancing their comprehension through dialogue. The lesson's activities involve the use of 'First, Then, Now' prompts, where children draw and cross out items to determine how many are left, practicing with a variety of number stories that include scenarios where the result is zero or the original amount.

Differentiated worksheets and teaching slides guide the children through the lesson, with ten frames and counters aiding in visualising the subtraction process. Activities are structured to allow children to represent subtraction in different ways: drawing and crossing out objects on ten frames, using counters to represent objects that are taken away, and writing out the corresponding number sentences. The lesson also incorporates reasoning and problem-solving tasks, where children are asked to convert subtraction scenarios into number sentences and use part-whole models to demonstrate their understanding. To consolidate learning, the 'Give me five' reflection activity prompts children to consider what they have learned, the skills they have used, and any aspects they found challenging. The lesson aims to build confidence in subtraction within 20, catering to varying levels of ability, from 'Working Towards' to 'Greater Depth'.