High School Programs


Learn what aquifers are, how they work, and why they are important. Using our aquifer model, students will learn about the different layers and how everyday actions can impact surface and groundwater. They will consider the effect that the growing population in Florida has on the aquifer and the environmental impacts resulting from human activity through a discussion of saltwater intrusion into the Biscayne Aquifer and the growing concern of sinkholes around the state. Max 25 students.

Water Quality

Test the water quality of the St. Johns River or one of its tributaries. Work in small groups to run the tests such as temperature, salinity, pH, turbidity, Nitrite/Nitrates and Ammonia, and analyze the data to get an understanding of the waters overall health. Discuss how human activity impacts our waterways and how we can avoid the repercussions.  *This program can be performed once or as a year-long river study. We provide all materials for teachers to conduct studies independently. Max 25 students.

Eutrophication Experiment

Nutrient pollution is one of the biggest issues the St. Johns River faces. The influx of nutrients from fertilizer and animal waste can cause HABs resulting in fish kills and SAV reduction. This three week lab simulates the effect of nitrogen and phosphorus on freshwater algae using a common plant fertilizer. Students will measure turbidity and dissolved oxygen multiple times in order to generate graphs from their classes data to show the change of time across the four treatment groups. We will conclude with what can be done to protect the river inhabitants and reduce the potential for future algal blooms. All materials provided by St. Johns Riverkeeper.

Visit our Resource pages to watch documentaries on the algae blooms in our St. Johns River

Please contact for details of class limitations and classroom requirements.

Field Trips and Community Service

Interested in a field trip or need community service hours? Please visit our Field Trip page for more program opportunities.


Want to help cleanup the St. Johns River every month? Join us for our monthly cleanup on McCoys Creek in our River’s Lower Basin led by Rising Tides, our Young Professionals Group. Visit our Events page for more information. Waiver forms required for anyone under the age of 18.

St. Johns RIVERKEEPER is a privately-funded, independent and trusted voice for the St. Johns River and the public to whom it belongs. We are a 501(c)(3) organization and rely on the support of our members, donors, and volunteers to accomplish our mission. Please consider making a donation to support our educational programming.

Suggested donation, $5 per person