Addition and subtraction - Add three one-digit numbers - Planning

In Year 2, during the Autumn term's fifth week of Addition and Subtraction, students are encouraged to strengthen their understanding of number bonds to 100, focusing on tens and ones. The lesson begins with a starter activity that prompts students to recall number facts that can assist them in finding bonds to 100. The class teaching input involves using Base 10 manipulatives as visual aids to support the students' fluency in calculations. They are encouraged to verbalise their thought process using stem sentences such as "I know...", "I think...", and "It can't be... because...". This helps them articulate their reasoning and understand the place value system more deeply.

During the lesson, reasoning activities are employed to challenge the students to prove their answers and represent their thinking using Base 10. For instance, they may be asked to identify mistakes in given calculations and create examples for their peers to correct. Group work enhances collaborative problem-solving, allowing children to discuss various possibilities and justify their reasoning to one another. The lesson progresses to independent work, where differentiated worksheets provide tailored challenges for each student. Key questions guide the students to think critically about the composition of 100 in terms of tens and ones, and how to use Base 10 to reach 100 from any given number. The lesson aims to correct common misconceptions related to place value and the recall of known number facts, guiding students towards achieving expected levels or greater depth in their understanding.