Official Links

Trust Metadata

Last checked at: 20 Feb 2026

Verification status: Verified

Source URLs

• https://c3l6.com/
• https://www.c3l6.com/auth/register
• https://www.c3l6.com/app/pages/home

Evidence Text

• Official registration page requires school teacher account and school email verification.
• C3L6 pages describe the challenge as Lower Sixth focused.
• Competition Timeline for 2026
• Mon 01 Sep 2025
• Registrations open
• When teachers are able to register their students for this years competition (to do so, click the button in the pink banner that will appear after having logged in).
• Fri 29 May 2026
• Deadline to register your school
• You must have registered for this year's competition by this date to receive the paper.
• Mon 01 Jun 2026
• Exam circulation date
• Exam papers will be EMAILED to the registered and approved Principal Contact.
• Tue 02 Jun 2026
• Competition window open
• This is the first date that students can sit the paper.
• Fri 19 Jun 2026
• Competition window close
• This is the last date that students can sit the paper.
• Fri 19 Jun 2026
• Mark scheme published
• The mark scheme for the competition will be EMAILED to the Principal Contact.
• Thu 25 Jun 2026
• Mark entry deadline
• Teachers must enter student marks on-line up to midnight on this date.
• Fri 26 Jun 2026
• Return of high scoring scripts
• Please post high scoring scripts to arrive by this date.
• Mon 29 Jun 2026
• Final results published date
• All results will be finalised and published on-line. Certificates will be POSTED to the Principal Contact by Royal Mail during the following week.

Notes

Publicly indexed timeline pages currently show historical cycles; current-season dates should be confirmed after teacher login or official announcement.

Related Competitions

Similar competitions in United Kingdom under Science.