This article was updated April 2, 2026
In 1970, the first Earth Day sparked a massive public protest, with 20 million Americans taking to streets and college campuses to speak out against air and water pollution, wilderness loss, and animal extinctions. The public outcry led to the formation of the Environmental Protection Agency and legislation to safeguard air, water, and endangered species.
Although significant progress has been made in controlling pollution and preventing the extinction of notable species such as the bald eagle and California condor, the concerns of the past still linger. Furthermore, we now understand that human-caused climate change poses a significant threat that needs urgent attention to avoid extensive disruption of societies worldwide.
The following free Earth Day lessons and activities will help teachers explore this crucial subject with K-12 students in an engaging, age-appropriate way.
Best Free Earth Day Lessons & Activities
SubjectToClimate Lesson Plans
Superb set of all-inclusive lesson plans, teaching units, and activities from the nonprofit SubjectToClimate (STC) organization. What sets STC apart is the range of subjects viewed through the lens of climate change. You’ll find not only the typical Earth science and ecology lessons, but also lessons that link career skills, computer science, and performing arts with climate change. Searchable by grade, subject, standards, and resource type. Additionally, STC offers wide-ranging educator guidance, in the form of professional development, brief “climate change explainers” and even climate action plans for districts. Be sure to check out the Earth Day 2026 activity pages.
iNaturalist Bioblitz
Have you ever considered a bioblitz project for your classroom? A bioblitz is a group endeavor in which participants strive to record as many observations of wild species as possible in a given time/area. Using the free iNaturalist app and its extensive educator guidanceteachers can easily set up a bioblitz for any nearby location, including a schoolyard or city park. There’s life all around us. Help your students find it, identify it, and learn about it with iNaturalist.
This is My Earth Learning Activities
A selection of K-20 curricula from the nonprofit international environmental organization This is My Earth. These are not simply lesson plans; rather, each curriculum comprises a full nature preservation program to be covered over multiple classes. Topics include climate change, biodiversity, and conservation biology. Eight curricula and one teacher’s guide are included.
National Wildlife Federation: Schoolyard Habitats® Planning Guide
Even a small area of land can be a valuable and welcoming habitat for plants, pollinators, birds, and other wildlife. This comprehensive guide to creating a vibrant habitat on school grounds incorporates multiple STEAM topics and involves kids in hands-on work that will engage them deeply and offer ongoing opportunities to learn. Included in this 96-page PDF are several inspiring case studies from schools which have instituted the program.
TeachEngineering: Plastic Migration and Its Impacts
We’ve all heard of the atmosphere, biosphere, and other ecosystems. But have you heard of the Plastisphere? Sadly, this human-made “ecosystem” is a result of the massive quantities of plastic waste polluting our waterways. This NGSS-aligned multimedia lesson for grades 9-12 is rich with background information, glossary, assessment, extensions and homework ideas. Three associated activities allow for hands-on learning.
National Oceanic and Atmospheric Administration: Investigating Coral Bleaching
Outstanding standards-aligned lesson for students in grades 6-12 that uses current and historic data to understand the effects of climate change on coral reefs. This 5-level module includes interactive maps, graphs, and videos as well as fillable PDFs, editable Powerpoint worksheets, answer keys, and a comprehensive guide for teachers. Aligned to NGSS, these activities may be integrated into an existing curriculum, and support three-dimensional learning (principles, core ideas, and concepts).
The Nature Conservancy: Virtual Field Trips
A top-notch collection of highly engaging video field trip lessons, accompanied by extensive teaching guides. Explore Utah’s Great Salt Lake, China’s great forests, Peru’s coastal ecosystem, and many more fascinating natural habitats. Educator guides feature complete background information; standards; discussion questions, and answers; handouts and extension activities. Bring the natural world into your classroom with these virtual field trips.
Earth Day Digital Lesson Bundles
Two complete lesson bundles focus on clean water and sustainable communities. Each downloadable bundle includes a video, slide presentation and guide for educators. Grades 6-9.
Earthday.org Education Resource Library
From one of the oldest nonprofit organizations devoted to Earth Day comes a wealth of resources, not only for K12 teachers, but also for anyone wishing to become an Earth advocate. Included are toolkits, lesson plans, quizzes, and ideas for marking Earth Day for schools, businesses, and families. Want to go deeper? Check out the Earth Day 2026 event calendar for in-person activities ranging from cleanups to marches and rallies.
Symbiotic Schoolyard
A remarkable, unique program designed and implemented by middle school science teacher Janneke Petersen, Symbiotic Schoolyard seeks to engage kids in hands-on planting activity. But not just any plants: Petersen’s Schoolyard Habitat Restoration curriculum focuses on restoring habitat by planting and nurturing native plants. Rarely do I include a non-free resource in my “Best Free …” articles but I made an exception for Symbiotic Schoolyard because there’s nothing else like it out there. And Petersen does provide a free consultation if you want to know more before purchase. Even better, she has extended a generous discount to Tech & Learning readers. Simply email symbioticschoolyard@gmail.com and mention this article to secure a special Earth Day 30% discount.
Visiting a Recycling Plant
Recycling, when done properly, is a valuable tool in the eco-friendly toolbox. But what actually happens to the products you place in the recycling bin? This brief video follows the “paper trail” of one of our most frequently recycled materials. A background essay, discussion questions, and state standards accompany the video.
How to Save Our Planet
The acclaimed British naturalist and broadcaster David Attenborough opens this video by posing the essential problem of our time: “How do we create a future in which both people and nature can thrive?” The question is simple—how about the answer? The video touches on how humans have engineered our current geological epoch, the Anthropocene, and moves quickly to four specific goals that we must achieve to slow the dramatic climate changes we’re experiencing now. Be sure to also watch related videos exploring topics such as “Why do we need biodiversity?” and “What can young children do in the fight against climate change?”
11 Reduce, Reuse, Recycle Lesson Ideas For Every Subject
Eleven 3R projects that can be easily implemented in the K-12 classroom in subjects such as math, language arts, civics, and science.
PBS Learning Media: An Unpredictable Environment
An NGSS standard-aligned video highlighting how Inuit peoples are facing unprecedented challenges to their traditional knowledge of weather patterns. An elderly Inuit woman explains how forecasting the weather for hunting trips was a task traditionally assigned to women and girls, however, with recent climate changes, the reliability of using Alaska Native science to predict weather and associated animal behaviors has been greatly diminished. Shareable in Google Classroom or via link, this video can form the basis for a complete slide-based lesson.
Conservation Station Classroom Activities
Grow energy-water literacy and conservation efforts through 18 downloadable, standards-aligned classroom lessons and activities. Activities focus on communication skills, critical thinking, collaboration, and creative thinking in the context of sustainable water and energy use. Intriguing topics include “Harvesting Energy in Your School,” “Smart Schools,” and “World Water Day Gallery of Art.”
A little eco-nostalgia!
Watch On
Discovery Education Student Activities
Thirteen quizzes and activities encourage students in grades 3-12 to think critically about current environmental challenges, from deforestation to waste reduction to energy consumption. The downloadable/printable PDFs include notes for educators.
Build the Change Classroom Resources
A collection of standards-aligned classroom lessons, activities, and games designed to help kids examine environmental topics, from helping sea turtles to renewable energy to the importance of recycling and upcycling.
Nature Lab Educator Resources
Nature Labs’ educator resources are ideal for Earth Day, encompassing topics from wildfires, climate justice, sustainable food and water, and more. Ideal for hands-on or project-based learning.
Climate Restoration for Kids
The goals of climate restoration go well beyond limiting our CO2 emissions. Climate restoration advocates believe that we can capture and sequester enough carbon from the atmosphere to reverse the anthropogenic effects. In this interactive online course for grades 3-5, kids will learn about climate change, the carbon cycle, and climate restoration. Includes a quiz and art and writing competitions.
The Lorax Project
Excellent ideas for a stimulating classroom discussion about how human society treats the Earth, as seen through the lens of Dr. Seuss’ cautionary environmental tale, The Lorax.
World Wildlife Fund Lesson Library and Education Resources
The effects of human activities on the Earth is sadly reflected in the severe reduction of animal species and their habitats across the globe. The WWF offers a robust set of lessons, apps, games, quizzes, and videos covering the top charismatic animals—tigers, turtles, and monarch butterflies—as well as reptiles, food and plastic waste, wildlife arts and crafts, and more
TEDEd: Earth School
Enroll in TEDEd’s free Earth school and dive into 30 lessons covering the full gamut of issues, from transport to food to people and society and many more. Each video lesson contains open-ended and multiple choice discussion questions and additional resources for further study.
Ghost Forests
What’s a ghost forest? Sadly, it’s the dead remnants of once-thriving ecosystems that have been decimated by changing climate, invasive pests, and disease. This video collection from PBS Learning Media looks at the case of the imperiled whitebark pine, why it’s crucial to the ecosystem, and how scientists are racing to save this keystone species.