Awareness day - Selecting the trash and making sure you're putting them in the right bin.

Exchange of clothes, toys, books and games. Collecting and selling them to collect money for charities.

Making it a daily/weekly routine. Making turns between classes.

Competition between classes to bring more paper. The paper goes to a factory, that gives money in exchange. The money is used for children who can't afford school trips. The winners can choose the meal for the whole school one day.

Create posters. On each poster you have some pictures on how to recycle materials (like a broken sharpener).

Create different super heroes with different missions. Each group has a super hero that has to accomplished different missions, focusing on different themes (e.g. don't waste, switch the light off, ...)

Include parents and children in the Green School Committee. Use reusable bottle with purifying water.

Make a vegetable garden / greenhouse. Each class has a different species (tomatoes, strawberries, ...) Sometimes, it can be served for school lunch.

Gardener and Cooking assistant can compost the food waste.

Make sculptures out of metal scraps.

Give more money, but also more responsibilities to some teachers. Next job will be the green school coordinator.

Cooperate with the local authorities to plant trees. Planting trees or reforesting an area. You can do it from one year to another. The forest guard knows what to do and can guide the students.

Two teachers are fixing broken or ripped clothes.

Recycling electrical appliances.

Students can organize a sustainability advertising to present to the community.

The municipality is managing the food waste to collect data. Then the school can decide targeted interventions.

Asking parents who can ask us and how. They can make presentations in classes (e.g. a father made a presentation to check breast cancers).

Putting installations in the middle of the school, and they are made out of reused materials.

Treasure hunting game revolving around sustainability. Asking teachers to make quizzes. Play those games on a specific day.

Erasmus project where you display presentations in the middle of the town, in cooperation with the local authorities.

Creating a challenge with different actions, such as collecting trash, planting flowers. At the end of the year, the winners have a day off.

Contest called "win-win" in Year 1 and 2. Teachers give points to classes, depending on which one behaves the best, is cleaner, apply good habits. The player of each month can choose the bell ring for a week.

Making instruments out of recycled products.

Letting children making clothes and organize a fashion show.

Gardian of nature.

Eco-hero.

Jeopardy quiz.

Donjon and Dragons roleplaying adventures, related to chemistry.

Escape rooms with puzzles.

Simulation games with one player that is a city counsel.

Roleplay cards with a Game Master that talks more (during a language class).

Children present in groups different countries and establish their profiles (use of renewable energies, fossil fuel, use of water...) and then you can make a competition with which countries are the best at something...

Stop motion animations illustrating the sustainability issues and the solutions.

https://climatekids.nasa.gov/

Minecraft education

Try to match the spices without seeing them to combine the 4 senses.

Become a journalist team of the future. They analyse their "past" (our present), and our decisions. They write an article about it.