High School Programs

Due to COVID-19, all in-person classroom educational programming has been suspended until further notice. Please visit education’s Virtual Learning page for available virtual classroom programs, educational videos, and at home activities.

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.

Rock Porosity Experiment

Rocks can hold oil, natural gas, and water due to physical properties called porosity and permeability. Students will investigate the porosity of limestone, sandstone, and basalt to calculate the percent porosity of water, oil, and natural gas that can potentially be stored in these rock formations. This 24 hour or 48 hour lab requires a visit from a St. Johns Riverkeeper Educator to lead and wrap-up the activity. In addition to the experiment, the lab includes an individual water usage calculation, an introduction to aquifers and natural gas, environmental impacts and repercussions of ground resource extraction, and a discussion on alternative sources of water and oil/gas. All materials provided by St. Johns Riverkeeper. *Experiment adapted from Rock Porosity Experiment by AirWaterGas Network.

Visit our Resource pages to watch ‘Troubled Waters’ to learn about our impact in the Floridan Aquifer through nutrient pollution, population growth, and over pumping.

Please contact for details of class limitations and classroom requirements.

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 per program

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