Rationalising Denominators – Complete Lesson

This is a complete lesson on rationalising denominators that will teach students how to write surd expressions with rational denominators. The lesson is designed with the new GCSE specification in mind.

Lesson Objective

  • To rationalise the denominators of fractions involving surds.

Who is this Lesson For?

This pack is designed for GCSE higher tier students. It could also be used with high ability Key Stage 3 students.

What is Included?

Included in this download are the following:

  • Full lesson plan for the ‘Rationalising Denominators’ lesson, including introduction, teaching content, individual activities, plenary and suggested support and extension activities
  • Surds Mind Map
  • Student Worksheet on Rationalising Denominators
  • Plenary Slide
  • Further Algebra Fact Sheet
  • Complete Solutions to all Questions

Lesson Progression

This is the first lesson in the Further Algebra unit of work (the unit is also available as a pack including homework activities and a unit assessment).

The other lessons in the unit are: