Addition and subtraction - Add two three-digit numbers not crossing 10 or 100 - Planning

In Year 3, during Autumn's fourth week of Addition and Subtraction, students will learn to add two three-digit numbers without the need for exchanging across tens or hundreds. The lesson emphasises the importance of correctly aligning the digits and setting out the addition neatly in columns. Students will revisit the concept of place value and ensure they understand when it is unnecessary to exchange, specifically when a column has fewer than ten. The class will engage in partner discussions and activities to explore different representations of place value and calculations, such as using a place value mat, bar models, part-whole models, and number stories. Outdoor practical activities involve using natural materials to represent ones, tens, and hundreds, encouraging a hands-on approach to understanding place value and addition.

Following the outdoor learning experience, students will delve into reasoning tasks designed to address common misconceptions and deepen their comprehension. They will use sentence stems to articulate their thought processes and complete independent work with differentiated worksheets. The lesson includes a reflection segment where students assess their learning, understanding, and the strategies they found helpful or challenging. To cater to different levels of mastery, the lesson plan outlines goals for students working towards expectations, at the expected level, and at greater depth. These goals range from filling in a completed answer using a place value chart and column addition to solving more complex calculations involving hundreds, tens, and ones.