Addition and subtraction - Subtract one from two-digit numbers 2 - Planning

In the third week of the Autumn term, Year 2 students delve into the concept of subtracting one-digit numbers from two-digit numbers, with a particular focus on instances where this subtraction crosses the ten boundary. The class uses a variety of resources such as ten frames, number lines, base 10 blocks, and place value grids to support their learning, alongside worksheets and a presentation. The key vocabulary for the lesson includes terms like subtraction, subtract, take away, equals, ten frame, exchange, more, less, tens, and ones. The children are encouraged to complete a set of 'fluent in four' questions to demonstrate their understanding of the material.

The lesson begins with a review of previous learning, reminding children of the importance of recognising multiples of 10 in subtraction. For example, when subtracting 8 from 18, the result is 10, and similarly, subtracting 7 from 67 leaves 60. The first activity requires students to subtract 4 from 23 and understand the need to subtract 3 to reach 20, then determine what remains. In the second activity, children use whiteboards to practice partitioning numbers and applying this method to various calculations. The third activity introduces the concept of finding the difference between numbers, where children use base 10 blocks to visually comprehend the subtraction process. The lesson concludes with a reflective 'Give me five' plenary, where students assess what they've learned, the skills they've used, and what they found challenging, ensuring they remember the key points of the lesson. Differentiated support is provided to cater to various learning needs, from guided number line usage to completing full diagrams and investigating mathematical statements.