How to Make Composting in the Classroom Fun (And Educational) for Kids

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Updated | 3 min read

Not sure how to teach composting to kids or how to create a composter for the classroom?  Whether you’re teaching about decomposition, sustainability, or a host of other topics, setting up a classroom compost bin for the kids in your class is a prime hands-on learning experience that’s good for the planet. And we’re about to make the whole process extra easy for you!

The teachers on the Teach Starter team have put together instructions to make composting for kids fun and educational in your classroom, plus some helpful information about how teachers can get free compost bins for your school!

What Are the Benefits of Composting in School?

It may be hard to believe, but food waste makes up about 21 percent of what the US Environmental Protection Agency calls municipal solid waste (MSW). In just one year, the US creates about 63 million tons of food waste. And schools are contributing pretty heavily to that number — in one report from the World Wildlife Fund, it’s estimated that U.S. school food waste adds up to 530,000 tons per year, including 19.4 gallons of milk thrown out every school year. All that waste costs as much as $9.7 million a day to manage.

Composting our food waste, in general, can do myriad things for the environment, from reducing the amount of trash that ends up in our landfills to improving water quality. But composting in schools teaches kids to be good stewards of the Earth while also providing real-life lessons on biology, chemistry and physics.

Setting Up Composting For Kids

Get a compost bin

To start things off, you’ll need a compost bin for your students (and you) to fill with scraps that can be turned into compost. If this composting project will remain in the classroom rather than being set up somewhere outside on school grounds, a simple plastic tote will do the trick, or you can check out this list of popular composters for use inside.

green bubble with the words

Add holes

Although your bin should keep your waste nice and dark for breaking things down, ventilation is key! If you opted for a plastic tote, rather than a bin specifically created for composting, you’ll need to drill holes around the top of your bin to allow for airflow.

Perform a lunchbox audit

To help start composting for kids in your classroom, a lunchbox audit puts food waste issues into a real-life context. Using these helpful lunchbox audit worksheets, your kids can collate the food waste they’re creating, graph the data, and create an action plan for reducing their food waste.

Register your school’s program

The Environmental Research and Education Program has a nationwide data collection program that looks at food waste in cafeterias of K-12 schools. Register your school, and you could be part of guiding future policy initiatives.

Decide if you want to vermicompost

You can keep things simple with basic food waste and other organic materials from the classroom that will decompose, or you can add an extra fun component for the kids — earthworms! Called vermicomposting, using worms to break down materials offers your students additional hands-on learning … if they’ll touch the worms, that is!

how to build a worm farm instruction sheets for kids on an orange background with two lime green bubbles with text that reads

What Can We Compost At School?

The best part of composting for kids is the learning experience, but this is probably our second favorite part: So much food waste can be plucked out of the trash stream and put into the classroom recycling bin!

Some biodegradable items you can recycle in your classroom include:

  • Fruit and veggie leftovers like orange peels and apple cores
  • Shredded paper (staples should be removed first)
  • Coffee grounds and filters
  • Tea bags (again, staples sound be removed)
  • Dry cereal

Post one of these compost/trash/recycle posters where kids can see them, so they know what to throw in the compost bin, what to recycle, and what can go in the garbage can!

composting poster for classroom

How to Pay for Your Classroom Composting Project

Composting is a relatively inexpensive project, but it’s also an important one. That’s why there are some funding sources out there for teachers.

See more fun science resources for teachers to use in the classroom!

Banner image via shutterstock/light field studios


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