The honest version: the official syllabus says questions come from school textbooks. Here is the exact Samacheer map, what guides add, and what you can skip.
The official TNPSC scheme notes that the paper is based on school textbooks with degree-standard depth for mains subjects. TNPSC questions routinely quote Samacheer lines verbatim, which is why toppers read the textbooks and not summaries of them.
Every Samacheer Kalvi book is a free PDF from the Tamil Nadu Textbook Corporation, in both Tamil and English medium. Your total book budget can genuinely be zero.
Which Samacheer classes cover each unit of the TNPSC Group 1 syllabus, ordered by that exam's approximate question weightage.
| Syllabus subject | Weightage | Read this | Why |
|---|---|---|---|
| History & TN History | ~15% | Samacheer Social Science (History), Classes 6 to 12 | TN-specific chapters matter most: Sangam age, Dravidian movement, freedom struggle in TN |
| Polity | ~15% | Samacheer Civics chapters, Classes 9 to 12 | Constitution, rights, local government chapters cover the 15-question unit |
| Aptitude & Reasoning | ~15% | Samacheer Maths (Classes 6 to 10) + practice sets | The official unit list is small: percentages, ratio, interest, area, volume, time and work |
| Geography | ~12% | Samacheer Geography chapters, Classes 6 to 10 | TN rivers, soils, climate and India physical features |
| Economy | ~12% | Samacheer Economics chapters, Classes 9 to 12 | Add TN budget highlights and welfare schemes from current affairs |
| Tamil (Eligibility Test) | ~11% | Samacheer Tamil, Classes 6 to 10 | Grammar sections and prose/poetry exercises map directly to the Tamil test units |
| Science | ~10% | Samacheer Science, Classes 6 to 10 | Everyday physics, chemistry and biology, exactly the SSLC standard the paper uses |
| Degree-standard additions | All units | Samacheer Classes 11 to 12 (History, Polity, Economy) | The TNPSC Group 1 paper is degree standard, so the higher-secondary volumes matter as much as the SSLC set |
Established TNPSC publishers (Sura's, Devira and similar) compress the Samacheer library into single revision volumes with practice questions. That consolidation is real value in the last month before the exam.
Their limitation is the same as their strength: they summarise. When a question quotes a textbook line the guide skipped, only Samacheer readers score it. Buy one guide for revision if it helps you, not five.
Samacheer PDFs cover the theory. For practice: every previous-year paper with answer keys is solvable free on superprep, plus a daily current-affairs feed in Tamil and English, and the official unit weightage to order your reading.
Start practising freeRecommendations follow the official syllabus note that questions are based on school textbooks. Sources: TNPSC official notifications. Figures are indicative and may change with each official notification. Data last reviewed: July 2026.
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