1. School 1, Lancaster Girls Grammar, Lancashire, UK.

2. School 2, Illinois Math and Science Academy, Illinois, USA.

3. School 3, Kaohsiung Municipal Kaohsiung Senior High School, Kaohsiung City, Taiwan

4. School 4, Korea Science Academy, Busan, S Korea.

5. School 5, Ritsumeikan Uji Senior High School, Kansai, Japan

6. School 6, National Junior College, Singapore.

7. School 7, Mahidol Wittayanusorn School, Nakhon Pathom, Thailand.

8. School 8, Alam Shah Science School, Bandar Tun Razak, Kuala Lumpur

9. School 9, NUS High School of Math and Science, Singapore.

10. School 10, John Monash Science School, Melbourne, Victoria, Australia.

11. School 11, Chulalongkorn University Demonstration Secondary School, Bangkok, Thailand.

12. School 12, Camborne Science and International Academy, Cornwall, UK

13. School 13, Camborne Science and International Academy, Cornwall, UK

14. School 14 Surya Institute, Banten, Indonesia.

15. School 15, Lewiston Porter High School, New York, USA.

16. School 16, Australian Science and Math School, Adelaide, Australia.

17. School 17, Fort Richmond Collegiate, Manitoba, Canada.

18. School 18, Korea Minjok Leadership Academy, Gangwon, S Korea.

19. Key to QEMSCAN® false colour images.