SOF ISSO Answer Key 2025–26 (Set A & B Released): Download Class-wise PDFs
SOF ISSO Answer Key 2025–26 for Set A and Set B has been released by the Science Olympiad Foundation. Students of Classes 3 to 10 can download class-wise PDF answer keys from sofworld.org to check responses and estimate scores.
SOF ISSO Answer Key 2025-26: The Science Olympiad Foundation (SOF) released the SOF ISSO Answer Key 2025–26 for Set A on 3 November 2025. Students who appeared for the International Social Studies Olympiad (ISSO) can download the class-wise answer key PDFs from the official website, sofworld.org.
Additionally, the ISSO Answer Key 2025 for Set B was released on 24th January 2026, corresponding to the examination held on 18 September 2025. Candidates can access the Set B answer key in PDF format from the official SOF portal to verify their responses and estimate their scores. The answer key for Set C is expected to be released in February 2026.
SOF ISSO Answer Key 2025-26 SET B (Out)
The Science Olympiad Foundation (SOF) has officially released the ISSO Answer Key 2025 for Set B on 24 January 2026. This answer key corresponds to the ISSO examination conducted on 18 September 2025. Students can download the Set B answer key in PDF format from the official SOF website for reference and score evaluation.
SOF ISSO Answer Key 2025-26 Overview
The SOF ISSO is an annual competition to test students’ knowledge in Social Studies. Below is a concise overview of the exam's important details.
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SOF ISSO Answer Key 2025-26 Overview |
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Particulars |
Details |
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Exam Name |
SOF International Social Studies Olympiad (ISSO) |
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Conducting Body |
Science Olympiad Foundation (SOF) |
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Exam Dates |
Date 1: September 18, 2025; Date 2: November 20, 2025; Date 3: January 23, 2026 |
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Answer Key Release (Set A) |
November 3, 2025 |
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Answer Key Release (Set B) |
January 24, 2026 |
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Classes Participated |
Classes 3 to 10 |
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Official Website |
sofworld.org |
SOF ISSO Answer Key 2025-26 Set A and B (Class 3-10)
The Answer Keys for Set B have been published class-wise. Students must click the links on the official SOF portal to download the respective PDFs Set A ans Set B.
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SOF ISSO Answer Key 2025-26 Set A and B (Class 3-10) |
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Class |
Answer Key Download Link Set A |
Answer Key Download Link Set B |
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Class 3 |
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Class 4 |
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Class 5 |
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Class 6 |
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Class 7 |
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Class 8 |
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Class 9 |
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Class 10 |
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Steps to Download SOF ISSO Answer Key 2025-26
The Answer Key is released only on the official website in PDF format. Follow these simple steps to access your required key.
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Visit the official SOF website: sofworld.org.
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Find and click on the “Answer Key” link.
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On the next page, select your specific class.
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Download the SOF ISSO Answer Key PDF.
SOF ISSO 2025-26 Marking Scheme Class Wise
Understanding the marking scheme is essential for calculating an accurate self-assessment score. The structure varies slightly depending on the student's class.
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SOF ISSO 2025-26 Marking Scheme Class Wise |
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Class |
Total Questions |
Total Marks |
Marks Per Question (Achievers Section) |
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Classes 3 & 4 |
35 |
40 |
2 Marks |
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Class 5 |
50 |
60 |
3 Marks |
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Classes 6 to 8 |
50 |
60 |
3 Marks |
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Classes 9 & 10 |
50 |
60 |
3 Marks |