Resources · Subjects

Computer Science Lessons for Class 1 to 10 and O Level

5 topics to explore. You are seeing the free ones, create a free account to see them all.

Try Computer Science free: no account needed

One lesson, one quiz and one worksheet, open to everyone. It does not matter which class you are in. Start anywhere.

📘Read a lessonIntroduction to ComputersClass 5Start reading →🧠Take a quizIntroduction to Computers: Easy 1Class 5Play it now →📄Download a worksheetClass 5 Computer Science: Introduction to ComputersClass 5Open & download →
All Computer Science topics
💻Free

Introduction to Computers

What a computer actually is, what it is made of, and what it cannot do.

Class 5💻Free

Computer Hardware & Software

The physical machine, the instructions that run on it, and how they meet.

Class 6💻Free

Number Systems & Data Representation

Binary, and how text, images and sound all become numbers.

Class 7💻Free

Operating Systems Basics

The software that manages everything else.

Class 8💻Free

Algorithm Design & Problem-Solving

Decomposition and abstraction, flowcharts and pseudocode, searching and sorting, validation and testing. Paper 2 begins here and most of its marks are for method.

O Level
Full library

Open all 396 topics

A monthly or yearly subscription unlocks every lesson, step by step, with diagrams and worked examples. Built with AI and reviewed by real teachers to Cambridge and Oxford standards.

396topics
8subjects
11class levels
3,257lesson parts
See plans & pricing →or create a free account

71 lessons are free. Prefer to pay per topic? A topic bundle includes its full lesson.

Ready for all of it?

Unlock every Computer Science topic

Every lesson, every quiz and every worksheet, in Computer Science and in every other subject, to Cambridge and Oxford standards.

Free trial14 daysFull access, no card needed
Best valueYearly$29.99per year
Monthly$3.99per month
Start my free trial →Compare all plans