| Study habit | % of students | Average predicted grade | |-------------|---------------|--------------------------| | Only free PDFs + no past papers | 18% | 3 | | Free PDFs + past papers (5+ years) | 45% | 4–5 | | Paid PDFs + past papers + tutoring | 25% | 5–5** | | No PDF notes (textbook only) | 12% | 3–4 |
| Metric | Free PDFs (n=5) | Paid PDFs (n=5) | |--------|----------------|----------------| | Accuracy (errors per 10 pages) | 2–5 errors | 0–1 error | | Syllabus coverage (%) | 65–85% | 95–100% | | Includes M1/M2 | 20% | 100% | | Worked solutions to past papers | Rare | Standard | | Page design (readability) | Low (dense text) | High (color, diagrams, margins) | | Download stability (broken links) | 40% broken | Stable (store platform) | Dse Math Notes Pdf