Each delegation consists of either three or six students and upto three mentors/teachers (one of them is designated as the head of the delegation or "head mentor"). A delegation may also include a handful of guests and scientific observers. Students must be under the age of 15 by December 31st of the competition year.

The competition consists of three examinations, a multiple choice examination, a structured theoretical examination and a practical examination. All the examinations have durations of 4 hours (at the international olympiads), and are held on separate days. Each examination is evaluated independently from the other and the sum of the results of the examinations determines a participant's overall result. A scientific jury, which is installed by the host country, suggests the tasks.

Kindly download the detailed syllabus of the International Junior Science Olympiad.

Please visit our resources page to find past papers and answer guides for the International Junior Science Olympiad.