Addition and subtraction within 20 - Find and make number bonds - Presentation

The educational resource in question is a presentation designed to teach students about finding and making number bonds within 20, with a particular focus on addition and subtraction. The lesson encourages students to build on their existing knowledge of number bonds to 10. It poses the question of what it means to work 'systematically', prompting students to think about methodical approaches to finding all possible number bonds. The presentation includes various activities where students are tasked with identifying number bonds represented by different coloured counters or Lego pieces. This hands-on approach is aimed at helping students visualize and understand the concept of number bonds through practical examples.

The presentation further challenges students to continue patterns to discover all number bonds to 12 and 10, ensuring they understand how to verify that they have found all possible combinations. In one activity, students are invited to describe number bonds shown in pictures, reinforcing their understanding of the concept. The lesson also includes reasoning exercises, where students are encouraged to use equipment like ten frames or Base 10 blocks to represent calculations and explore the properties of number bonds. These activities are designed to deepen the students' comprehension and ability to explain their thinking. Finally, independent work sections provide opportunities for students to apply their knowledge, identify errors, and find related facts, which helps solidify their understanding of number bonds and their application in addition and subtraction.