Place value - Rounding to the nearest 100 - Planning

In a Year 5 mathematics lesson on place value, students are introduced to the concept of rounding numbers to the nearest hundred. The lesson utilises a range of resources including Base 10 blocks, counters, a number line, and a counting stick, alongside worksheets and a presentation to facilitate learning. Key vocabulary such as 'multiples', 'round up', 'round down', 'place value', and the names of number places from 'thousands' to 'ones' are central to the lesson, with vocabulary cards and definitions available for reinforcement. The lesson begins with a recap of previous learning, including a mnemonic to help remember when to round numbers up or down based on their digit value.

Students engage in various activities to deepen their understanding of rounding. They identify multiples of 100 and use number lines to determine the closest multiple to a given number. Practical tasks involve using Base 10 equipment or counters to visualise and identify the hundreds before and after a number. The lesson emphasises the use of a number line as a visual aid to see which multiple of 100 a number is nearest to, with the rule that numbers in the middle should be rounded up. The lesson concludes with independent practice on differentiated worksheets, allowing students to apply their skills at varying levels of complexity, from visualising rounding on a number line to working with different representations of numbers before rounding them to the nearest hundred. Key questions prompt students to reflect on the process of rounding and its nuances, while a plenary ensures that any misconceptions are addressed, such as the correct column to look at when rounding and the correct rounding of numbers at the boundaries of 0 or 1,000.