GCSE – Lesson 9 – Unicode and file size calculation

Curriculum KS4 Unit Lesson

The lesson begins with revisiting ASCII and its limitations, namely that it can only represent 128 characters. You will then introduce Unicode as an alternative for a more universal character set. Learners will then calculate the number of bits that are needed to store a piece of text using ASCII and Unicode.

Learning objectives

  • Explain the need for Unicode
  • State that Unicode uses the same codes as ASCII up to 127
  • Calculate the number of bytes needed to store a piece of text

Package contents

  • Lesson plans
  • Slide decks
  • Learner resources
  • Homework

GCSE revision

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