Fractions - Subtract 2 Fractions- Planning

In a Year 4 mathematics lesson, students are introduced to the concept of subtracting fractions using bar models as a visual aid, with a focus on fractions with identical denominators. The lesson begins with a recap of previous learning, followed by a demonstration of how to subtract fractions such as 3/5 – 2/5 using a bar divided into fifths. Students are shown how to 'cross out' the corresponding number of parts from the second fraction, ensuring that the crossed-out parts are grouped together. The key vocabulary for the lesson includes terms such as 'fraction', 'numerator', 'denominator', 'subtraction', and 'bar model'. Practical activities involve using strips of paper folded into eighths to subtract fractions visually, reinforcing the concept that only the numerators are subtracted while the denominator remains the same.

During independent learning, students work on differentiated worksheets that challenge them to use bar models for subtracting fractions. They are encouraged to consider whether they are using the takeaway method or finding the difference, and to explore if partitioning fractions can aid in subtraction. The lesson also addresses common misconceptions, such as the importance of 'crossing out' the numerator of the subtrahend. The plenary includes a reflection activity where students assess what they've learned and identify the skills they've utilised or found challenging. The lesson plan outlines expectations for different levels of understanding, from working towards expected outcomes to achieving greater depth, with activities ranging from using practical equipment and pictorial representations to solving multi-step fraction subtraction problems.