TSL 2021 International Schools Essay Competition: PROTECTING BIODIVERSITY
How can we protect biological diversity and stop the sixth mass extinction?
Latest: What’s Next?
Now that the Finalists and Honourable Mentions have been announced, we have invited the top 4 essay writing students (2 primary and 2 secondary) from each country to take part in the International School Debates on July 5-6. Teacher Champions were contacted in March with details on how to register their students to participate. Debating students need to be registered by April 29 to participate in the International Debates. If you wish to attend the International Debates and Partner Power Summit: PROTECTING BIODIVERSITY, click on the link at the top of this page to register.
We have also reached out and connected all our Teacher Champions to encourage them to consider setting up a Country or Regional Debate. See our Debates page for more information on organising a Country Debate.
The results are in!
During such a challenging year, particularly for schools, teachers and students, we are delighted to have received a record 1,350 entries in our 2021 International Schools Essay Competition!
290 Teacher Champions from 213 schools, across 59 countries around the world, have enabled their students to share their ideas to help protect the Earth’s precious biological diversity.
Students have identified several key issues and causes of biodiversity loss including:
- Climate change
- Fossil fuels
- Deforestation
- Poaching
- Overfishing and increased agricultural production
- Pollution (particularly plastic)
- Overpopulation
- Lack of laws or suitable protection
and explored a number of exciting and innovative solutions including:
- Renewable energies
- Electric vehicles
- Reforestation programs and individual tree planting
- Creation of National Parks
- Vegan or vegetarian diets
- Organic food
- Urban/vertical farming
- The 3 Rs (Reduce, reuse, recycle)
- Improved laws and enforcement
- Increased public awareness (particularly via social media)
- Improved environmental and sustainability education
- Habit and mindset changes
Following on from the success of our first online International Schools’ Debates and Summit in 2020, this year’s Debates will take place online on July 5-6 to help support the broadest possible participation of schoolchildren from around the world.

The prizes
One overall Grand Prize trophy winner will receive a free international trip to a TSL Summit, including £500 spending money. The Top 10 essay medallists will receive eco-friendly e-medals with redeemable gift tokens included. All participating Teacher Champions, Essay Finalists & Honourable Mentions, and International Debate participants, will receive personalised e-certificates.
Key dates
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07 September 2025
TSL 2026 Competition Launch – SUSTAINABILITY CULTURE – registration for Teacher Champions/Schools opens on the TSL Submittable page
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08 March 2026 (midnight UTC) - EXTENDED BY A WEEK
Final deadline for entries via the TSL Submittable page will be extended by a week. PLEASE BE PATIENT if our submissions site is temporarily disabled on Feb 28-Mar 2 – it may take Submittable a few days to increase the submissions cap.
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01 May 2026
Announcement of International Competition 2026 Finalists & Honourable Mentions on the TSL website
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22 May 2026
Finalists & Honourable Mention certificates available on TSL Certificates Portal
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22 May 2026
The “Top 10” Finalists in the Primary and Secondary age categories will be notified via their Teacher Champions (using the Teacher Champion email addresses used to register for the Competition on the TSL Submittable page)
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End May 2026
Invitations for eligible students to participate in the International Student Debates will be sent to Teacher Champions, using their officially registered email addresses
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Early July 2026
International Student Debates – Primary & Secondary Schools – online