46 Computer Science Topics

We’ve created 46 modules covering every Computer Science topic needed for GCSE level. These are transferable across AQA, CIE, Edexcel, CIE & Internationally. Suitable for teachers or home educators alike.

Whether you’re a brand new Computer Science teacher, or you’ve been teaching ICT for years, our resources will save you hours and hours of lesson preparation every single week.

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Candidates should be able to:

  • explain the representation of an image as a series of pixels represented in binary
  • explain the need for metadata to be included in the file such as height, width and colour depth
  • discuss the effect of colour depth and resolution on the size of an image file.

How can an image be represented in binary?

Bitmap images

Bitmap images are made up of individual pixels. The colour of each pixel is represented as a binary number so the whole image is therefore stored as a . . .

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