Checked on 23 October 2026: CBSE Science Challenge registration remains open for Classes 8, 9 and 10 in affiliated schools. Schools must register by 30 October; both rounds are free.
Key dates
- Round 1 registration: 14–30 October 2026.
- School-level Round 1: 2–13 November; the MCQ paper becomes available to registered schools on 2 November.
- Round 2 nominations: 17–25 November. Schools may nominate six students: two each from Classes 8, 9 and 10.
- Computer-based Round 2: Tentatively 30 November–4 December; CBSE will confirm the specific day.
How students can take part
1. Ask your science teacher whether your school has registered. 2. Schools use LOC credentials on the official Science Challenge portal; students do not register individually. 3. Practise interpreting information and answering MCQs accurately. Round 1 has a 60-minute limit and considers speed as well as accuracy.
Read CBSE's official circular PDF.
Revise with [Class 9 notes](/school/class-9/) and [Class 10 Science notes](/school/class-10/science/).
Check the original source
CBSE official Science Challenge circular Acad-67/2026
Open official source
