Addition and subtraction within 20 - Subtraction crossing 10 counting back - Starter

The lesson plan for Year 1 students in their Spring Term, specifically on Week 3, Day 5, focuses on enhancing their addition and subtraction skills within the number range of 20. A particular emphasis is placed on the concept of subtraction across the number 10, using a counting back method. The "Fluent in Four" revision section starts with an exercise using ten frames to help students visualise and complete number bonds. This visual aid is a powerful tool for young learners to understand the relationships between numbers and to reinforce their mental arithmetic skills.

Students are tasked with a series of engaging mathematical challenges. They are prompted to calculate the result of doubling 9 and subtracting half of 2, which leads them to the answer of 17. Addition problems such as 13 + 6 are presented, alongside fill-in-the-blank equations that require students to determine the missing numbers to total 10. For example, they need to find the number that, when added to 3 and 5, equals 10, and similarly, the number that added to 4 results in 10. Additionally, students are encouraged to identify sets containing 3 items and figure out how many more cans are needed to reach a total of 10 cans, fostering their counting and comparison skills. These practical exercises not only improve their arithmetic fluency but also their problem-solving abilities.