Computer Science past papers · IB SL
2021–2026Group 4Paper 1 · Paper 2
IB Computer Science SL past papers — by session
Every recent Computer Science exam series we cover (2021–2026), each with Paper 1, Paper 2. Practise a paper, then mark it against the IB band descriptors — that's where the grade is won.
Practice by topic
Criterion-based practice for every syllabus point — revise the lesson, then mark your response band-by-band.
- 1.1Systems in organizations: planning and change management
- 1.2System design basics: components, usability and documentation
- 2.1Computer architecture: the CPU and primary memory
- 2.2Secondary memory and operating systems
- 2.3Binary representation of data
- 3.1Network fundamentals
- 3.2Data transmission and wireless networks
- 4.1Computational thinking: abstraction, decomposition and algorithms
- 4.2Connecting computational thinking and program design
- 4.3Introduction to programming: variables, control and methods
- 4.4Flowcharts, pseudocode and algorithm design
Papers by exam series
- May 2026SLPaper 1Paper 2
- November 2025SLPaper 1Paper 2
- May 2025SLPaper 1Paper 2
- November 2024SLPaper 1Paper 2
- May 2024SLPaper 1Paper 2
- November 2023SLPaper 1Paper 2
- May 2023SLPaper 1Paper 2
- November 2022SLPaper 1Paper 2
- May 2022SLPaper 1Paper 2
- November 2021SLPaper 1Paper 2
- May 2021SLPaper 1Paper 2
Practise any paper, then upload your answer for criteria-based feedback while official IB mark-scheme marking rolls out.
Frequently asked questions
- Where can I find IB Computer Science SL past papers?
- Every recent Computer Science SL exam series (2021–2026) is listed below by session, covering Paper 1, Paper 2. Practise each, then mark against the band descriptors.
- Does IB Computer Science have mark schemes?
- Yes — IB publishes mark schemes that use markbands and assessment criteria. Our guides explain how examiners place answers into level bands so you can mark your own work like an examiner.
- What's the best way to use Computer Science past papers?
- Work a full paper under timed conditions, mark yourself strictly against the band descriptors, list every mark you dropped, then drill those skills before the next session.
Best free IB Computer Science resources
Hand-picked, fully legal and free — official IB papers plus the best teacher-made notes and solutions.