Fresh and Salt is a collection of activities that enhance teacher capabilities to connect Great Lakes and ocean science topics. Designed to be used by teachers in grades 5-10, Fresh and Salt provides an interdisciplinary approach to ensure that students achieve optimum science understanding of both Great Lakes and Ocean Literacy Principles. This curriculum offers a varied range of instructional modes, including data interpretation, experimentation, simulation, interactive mapping, and investigation.

The 14 activities that make up Fresh and Salt were selected for their capacity to provide science process skills that students need for effective learning. This curriculum can also help prepare students to be responsible decision-makers that promote a sustainable society.

This project was led by IISG with funding and support from COSEE Great Lakes. Visit the IISG website to download or order a copy of Fresh and Salt.

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Join the 2026 Great Lakes BioBlitz! 🌎🦋📸Starting Earth Day, educators, students, youth groups, and families are invited to help document biodiversity across the Great Lakes region using iNaturalist. A kick-off webinar is scheduled for April 16th at 2 pm CT.Participate anytime during the four‑week event. Snap photos, make observations, and contribute to real conservation data while getting students outside and engaged with nature. Learn more and get ready to explore: https://sites.google.com/wisc.edu/annual-great-lakes-bioblitz/2026 #TeachingTuesday#GreatLakes
Don’t miss out! Join us for a deep dive into the latest Lake Michigan fisheries science.Topics will include:-Reef restoration impacts on aquatic and fish species-Wild reproduction rates for salmon and trout species from the Great Lakes Mass Marking Program-Fisheries update from the Illinois Department of Natural ResourcesLearn more & register: https://purdue.ca1.qualtrics.com/jfe/form/SV_86eBlPnbjdm7pPg
Celebrate Earth Day with freshwater science and good conversation! Join Illinois-Indiana Sea Grant, the Northwestern Center for Water, Loyola University researcher Tim Hoellein, and IISG’s Sarah Zack for Science Sips: Trash Talk about Chicago Waterways. Learn what research reveals about litter and trash in Lake Michigan and Chicago waterways and what we can do to help.Plus, enjoy Great Lakes trivia games!📅 April 22, 2026⏰ 7–9 PM📍 Sketchbook Brewing Company, Evanston Tap RoomCome curious and ready to test your Great Lakes knowledge!