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Earth Month is a chance for our students to engage in hands-on sustainability efforts across all three campuses. From clothing and book swaps to guest speakers, student activities, the Climate Carnival, and plastic film recycling, there are many ways to support this work at home and at school.
Here’s what parents can do to join in on our collective mission to be responsible and sustainable:
1. Participate in our clothing drives (scroll down for details).
2. Sign up for plastic films recycling pickup through Ridwell. Learn what plastic films are and sign up.
3. Read on to see what your kids are up to!
Thank you for your support – both at school and at home – of our community’s passionate sustainability efforts.
Student Green Teams
Faculty Sustainability Committee
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Upper School
April 6-17: Clothing drive for April 27-30 clothing swap (details below)
April 14: Upper school student Green Team at lower school to host Earth Week Carnival
April 20-25: Postcard writing to legislators | water bottle adoption | guest speakers Mark Z. Jacobson, Ph.D. and Linda Lanzi | clothing swap (details below) | Earthchella: performances, raffles, students share their sustainable actions and get a smoothie!
April 27–30: Clothing swap in the RPAC lobby. If parents would like to volunteer to help, they can sign up using this sign-up link.
April 27–May 6: Ridwell plastic film drive. Students may bring clean, dry plastic film from home and place it in the well-marked large collection boxes in the front and back loading zones. Please help keep drop-off and pick-up lines moving smoothly by having students bring the materials to the bins themselves. To see what types of plastic film can be collected, please visit this guide.
Middle School
All of April: Clothing and book drive; drop off in front office lobby or back loading zone.
April 20–30: Book drive swap | food waste weighing
May 5-7: Clothing swap (see details below)
Lower School
April 14: US student Green Team hosts Earth Week Carnival after school – Climate Games and more. Encourage your children to attend!
April 20–24: Earth Week classroom activities. This year, the lower school is using a broader Earth Week format to extend Earth Day programming across campus and increase student engagement. Departments will highlight sustainability themes within their disciplines, with ready-to-use activities that can be adapted to different classes, schedules, and time constraints throughout the week. Planned activities include Earth Day art and crafts in K–2 homerooms, a global warming debate in grades 3–5 English, a “Small Actions, Big Impact” activity in grades 3–5 math, a Green Guardian lesson in grades 1–5 science, and BrainPop Earth Day activities in grades 3–5 social studies/history.
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Do you know that textiles account for 10% of global waste and 20% of water use each year? Help the environment and repurpose your gently used clothing by giving it a new home through the lower, middle and upper school clothing swaps! (All clothing and shoes should be clean and in good shape.)
Upper School: Donations now through April 17 in the marked boxes in front of the RPAC and at the end of Main Hall (the back drop-off area). Teen and adult sizes only; no child sizes, please.
Swap: April 27-30
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Middle School: Donations from April 6-23 in the marked boxes in the front office and back parking loop. Child, teen and adult sizes.
Swap: Week of April 21-23
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Additional Note: If you have other textiles or materials you’d like to recycle, support the Muwekma Ohlone Green Education Fund by bringing things to their boxes at these locations. (All items unclaimed at our swaps will be delivered to their drop-off.)
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Copyright © The Harker School 2026. All Rights Reserved.
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