A 1.2.2 Explain how binary is used to store data
This lesson explains how everything a computer stores, from whole numbers and text to images, sound and video, is held as binary. Students work from the idea that a pattern of bits has no meaning until an encoding is agreed, then explain the mechanism for each data type and what makes one item take more space than another. Writing numbers in binary and hexadecimal is covered first in A1.2.1. Last updated: 11 Jul 2026...