Original lessons for Prelims GS and CSAT, Mains GS I–IV and Essay. Explore each paper separately, then move from an observed theme to its chapter and topic notes.
Reviewed printed-paper observations
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Your common-core study map
These chapter groups organise the teaching. They are an editorial study route, not an official chapter list. Read the chapter overview or open a complete topic lesson.
Each reviewed printed parent has at most one analyst-assigned primary theme. Unresolved parents stay in the denominator. Secondary links, case subparts and writing-method lessons do not add primary counts. Essay offered prompts, required responses and maximum attainable marks remain distinct.
One paper and one year are shown at a time. The four-paper Mains GS structure began in 2013; GS Paper II became 33% qualifying from 2015. Earlier research-year selections do not establish equivalent paper identities or scoring rules. Counts from different paper types or historical schemes are not pooled. A zero observed count is not evidence that a topic is absent from the syllabus or a future exam.
Prelims answer keys are unverified. Descriptive classifications do not certify an official solution, the present truth of a question's premises or a score. Where an independently corroborated mirror supplied the actual paper, that basis is shown explicitly; original official-host binary identity is not claimed.