Fractions - Subtract Fractions - Planning

In a structured lesson plan tailored for Year 5 students, the focus is on subtracting fractions, particularly when denominators differ but are related as multiples. The session starts with a recap of prior knowledge, leading into the first activity where students are shown how to find a common denominator using table models. For example, to subtract 1/16 from 1/4, students learn to convert 1/4 into sixteenths, resulting in an equivalent fraction of 4/16. They then proceed to subtract 1/16, leaving 3/16 as the solution. This visual approach helps children grasp the concept of equivalent fractions and subtraction across numerators. Students practice this method with additional problems and share their answers, further enhancing their understanding.

The lesson continues with word problems that require students to identify the necessary calculations to find differences between fractions. Bar modelling is introduced as a tool for visualising subtraction of fractions such as 12/16 and 5/8. In group work, children engage with reasoning tasks from teaching slides and work on differentiated fluency and reasoning worksheets independently. The lesson concludes with reflective questions, encouraging students to consider the strategies they've used and to solidify their understanding of common denominators and equivalent fractions. Different levels of activities are provided, ranging from fluency in completing tables to problem-solving tasks that involve applying knowledge of perimeter to find missing fractional measurements, catering to students working towards expected levels and those capable of greater depth.