Explore NSO topics and choose a free practice test.
Subject overview is shown below. Check the source document for the full scope and exclusions.
2026 official source located
Source document: Science Olympiad Foundation 2026–27 programme and class-wise ISO syllabus
SOF renamed NSO to International Science Olympiad (ISO) for 2026–27. Its official syllabus is class-specific, so this catalog entry must not imply one universal chapter list. The source has separate class pages and level details; select the learner's class before constructing practice content.
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This is a subject list, not a question allocation.
Source-checked cut-off figures are not available here yet. The exam cycle, stage, category and marks or percentile need confirmation.
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