Review before publication
Question text, options, answer keys, explanations, learning notes, and required images are checked through OPH’s teacher-review workflow before a paper is published.
Content quality
Editorial and content-correction policy
How OPH prepares, reviews, publishes, and corrects learning content.
Age-appropriate presentation
Reviewers check whether wording, concepts, visual clues, and difficulty are suitable for the stated class while preserving meaningful Olympiad-style reasoning.
Corrections after publication
Reported issues are investigated against the source question bank and published learner view. Confirmed corrections are made through a controlled content update so future attempts use the corrected version.
Transparent reporting
Parents and reviewers can report the class, subject, paper, question number or question ID, and a short description. OPH does not ask for passwords or verification codes.
Last reviewed: 21 August 2026. To report an issue, use the Contact and support page.