National Standard Examination in Junior Science
It is organized by Indian Association of Physics Teachers (IAPT).
The NSEJS exam is based on objective type questions and are offered in English and Hindi.
The syllabus is broadly equivalent to up to Class X of the Central Board of Secondary Education (CBSE).
It has Age limit, which is changed every year. Students of class 8th, 9th, and a few of class 10th in age limit can appear for this examination.
The top 300 students from this stage qualify for the next round.

Indian National Junior Science Olympiad
The best-performing students from the NSEJS (approximately 300 Nationwide) qualify for the second stage - the Indian National Junior. Science Olympiad (INJSO), conducted by HBCSE. The INJSO is held in late January/early February at various centers across the country. The syllabus is almost the same as that of the NSEJS with enhanced level of intricacy. The tests consist of three sections consisting of single correct, multiple correct followed by subjective questions.
Top 35 students from this stage qualify for the next round.

Orientation Cum Selection Camp
The top students from the INJSO are selected for Orientation-Cum-Selection Camp held at HBCSE. At these camps, orientation is provided to students for Olympiad level of theoretical and experimental tasks.
Emphasis is laid on developing conceptual foundations and problem-solving skills.
Students are exposed to innovative experiments with focus on conceptual and procedural understanding in experimental science.
Top 6 students from this stage are selected based on their performance in both theory and practical. The team of these 6 students proceeds to IJSO.

Pre-departure Training
Before leaving, there is another stage called PDT,which is the fourth stage. The 6 member team goes through a rigorous programme on theory and experiment at HBCSE. Experts from HBCSE and various institutions across the country train the 6 members team.

International Junior Science Olympiad
The Olympiad program culminates with the participation of the 6 Indian students in this Olympiad.
The students are accompanied by 2-4 teachers or mentors. The 6 special merit awardees in Junior Science selected at the end of the OCSC constitute the 6 member student team for the International Junior Science Olympiad (IJSO) which represents INDIA at the International Level.
Top students from 40-45 countries (approximately) take part in the final level.