Addition and subtraction - Add and subtract 100s word problems - Planning

In a Year 3 mathematics lesson, pupils expand their understanding of addition and subtraction by engaging with word problems that involve adding and subtracting hundreds. The lesson begins with a starter activity designed to refresh the children's memory on adding hundreds to three-digit numbers. With resources such as coins, place value mats, worksheets, and a presentation, the class is set to dive into the day's topic. Key vocabulary includes terms like 'addition', 'subtraction', 'multiple', 'hundreds', 'tens', 'ones', and 'pounds', which are crucial for understanding the problems at hand. Through the use of word problems, children are encouraged to identify important information, differentiate between aggregation and augmentation, and apply the correct operations to find solutions.

The lesson incorporates practical activities, including partner discussions and creating their own number stories using concrete resources, to solidify their grasp of the concepts. For example, a number story about Malachi saving money introduces the lesson's focus, prompting pupils to use coins to represent amounts and solve problems related to savings. The class is encouraged to use various models like part-whole, number lines, and bar models to represent problems and to structure their thinking with sentences starting with 'First', 'then', and 'now'. To conclude, children reflect on what they've learned, the skills they've used, and what they found challenging, ensuring they understand the place value of digits, especially when dealing with money. Differentiated tasks are provided to cater to various levels of proficiency, from working towards the expected level to achieving greater depth by solving two-step word problems.