Introduction
The IB Computer Science SL course provides students with the foundations of computational thinking, problem-solving, and programming. Success in this subject requires both theoretical knowledge and practical coding skills across multiple components.
Knowing the 2025 Computer Science SL grade boundaries (Timezone 0) helps students set clear targets for each paper and the Solution project, ensuring consistent performance toward the final grade.
Quick Start Checklist for Computer Science SL
- ✅ Review core syllabus concepts for Paper 1.
- ✅ Practice algorithm and programming problems for Paper 2.
- ✅ Work on a strong Solution project with detailed documentation.
- ✅ Use past papers to track progress against grade boundaries.
- ✅ Learn the IB command terms (“describe,” “explain,” “evaluate”) to maximize marks.
IB Computer Science SL 2025 Grade Boundaries
Paper 1 (out of 70)
- Grade 7: 51–70
- Grade 6: 45–50
- Grade 5: 39–44
- Grade 4: 33–38
- Grade 3: 22–32
- Grade 2: 11–21
- Grade 1: 0–10
Paper 2 (out of 45)
- Grade 7: 32–45
- Grade 6: 28–31
- Grade 5: 25–27
- Grade 4: 21–24
- Grade 3: 18–20
- Grade 2: 9–17
- Grade 1: 0–8
Solution (out of 34)
- Grade 7: 27–34
- Grade 6: 23–26
- Grade 5: 19–22
- Grade 4: 15–18
- Grade 3: 10–14
- Grade 2: 5–9
- Grade 1: 0–4
Final IB Computer Science SL Grade Boundaries (out of 100)
- Grade 7: 73–100
- Grade 6: 64–72
- Grade 5: 55–63
- Grade 4: 45–54
- Grade 3: 32–44
- Grade 2: 15–31
- Grade 1: 0–14
Tips for Achieving a Level 7 in Computer Science SL
- Paper 1: Be precise with definitions and use diagrams where possible.
- Paper 2: Practice pseudocode and structured algorithm design to save time in the exam.
- Solution: Make your documentation clear — include problem analysis, system design, testing, and evaluation.
- General strategy: Work consistently across all components, since the Solution project carries significant weight.
Conclusion
The IB Computer Science SL grade boundaries for 2025 (TZ0) show the exact mark ranges needed for each grade. With consistent effort in Paper 1, Paper 2, and the Solution, students can aim for the prestigious Level 7.
