This C3L6 competition aims to stretch and challenge students interested in chemistry and will provide an excellent experience for anyone considering taking their studies further. Set by an experienced team of teachers and university chemists it is designed to be accessible to Year 12 students. However, it will take them significantly beyond the syllabus and encourage them to think about science in the way they would at university. 

Past papers will provide a valuable resource for teachers and after five successful years of online challenges, there are 180 puzzles available to students and teachers.

The competition is open to students studying in the UK in Year 12 (Lower 6th) or below. Teachers are emailed the 90 minute written paper to print for the students to sit under exam conditions at school. Students who do well in the competition will be sent certificates of achievement, and those who perform best will win an invitation to a residential camp at the University of Cambridge at the end of August.

• To register your school and students for this year's challenge, and view your school's results from previous years click here.

• Open access to past papers and reports on previous competitions here.

• To find out more visit:  https://c3l6.com/about