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Computer Science

22 premium lessons live for IB Diploma Computer Science. Learn visually, read concise notes, then practise with criterion marking on every topic.

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4 interactive simulations across 2 topics — run them inside the lesson

ContentsComputer Science HL · 22 topics

Unit 1 · 2 topics

System fundamentals

◆Systems in organizations: planning and change management1.1CONTINUE System design basics: components, usability and documentation1.2

Unit 2 · 3 topics

Computer organization

Computer architecture: the CPU and primary memory2.1 Secondary memory and operating systems2.2 Binary representation of data2 sims2.3

Unit 3 · 2 topics

Networks

Network fundamentals3.1 Data transmission and wireless networks3.2

Unit 4 · 4 topics

Computational thinking, problem-solving and programming

Computational thinking: abstraction, decomposition and algorithms4.1 Connecting computational thinking and program design4.2 Introduction to programming: variables, control and methods4.3 Flowcharts, pseudocode and algorithm design4.4

Unit 5 · 4 topics

Abstract data structures

Abstract data structures: recursion and the stack2 sims5.1 Linked lists5.2 Trees and binary trees5.3 Stacks, queues and the application of data structures5.4

Unit 6 · 2 topics

Resource management

Resource management: system resources and scheduling6.1 Memory management and virtual memory6.2

Unit 7 · 2 topics

Control

Control systems: sensors, actuators and feedback7.1 Embedded systems and microprocessors7.2

Unit 8 · 3 topics

Object-oriented programming (Option D)

Object-oriented programming: classes, objects and encapsulation8.1 Inheritance, polymorphism and abstraction8.2 OOP program design and UML8.3

How this course works

Pick a topic

Start at the top of the spine, or jump to the topic you are revising.

Learn visually

Diagrams, step cards and full notes — or flip to “explain simpler”.

Practise & mark

Attempt a real past-paper question, marked against the official scheme.

Mark complete

Tick the topic, watch your mastery ring fill, move to the next.

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Every lesson ends with criterion-style practice — marked band-by-band against IB assessment criteria, not a generic AI guess.

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Practise with IBO specimen papers and trusted free notes alongside this course.

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Computer Science — free IB HL course