Enlargement

Overview

Television can demonstrate enlargement on a scale rarely seen in the classroom. From a truly massive advertising stunt to a miniaturist who creates micro-sculptures, we see the effects that can be generated using enlargement. A range of unusual scale factors is investigated by examining the dimensions of real-life examples. Alongside these, the techniques required at GCSE are developed through dynamic demonstrations of working on a grid and graphic exploration of the effects of using different centres of enlargement.

The programme aims to enhance students' understanding of enlargement by taking the topic beyond the boundaries of paper and pencil work. Accurate graphics and clear visual explanations should allow students to see the concepts readily, without the distraction of drawing cumbersome diagrams. Whole number, fractional and decimal scale factors are covered. The topic is presented in a lively, interesting and entertaining style. The content is linked throughout to the requirements of GCSE Intermediate Mathematics. It includes tips for answering examination questions and a discussion of a typical exam error in the 'Tick or Trash' section. The content is chosen to engage the student audience, as well as to support teachers by bringing the outside world into the classroom.