National Geographic Education has produced Earth's Freshwater: A Guide for Teaching Freshwater in Grades 3 to 8. Chapter topics include:

1. Biodiversity in Freshwater
2. Water Cycle and Water Reservoirs
3. Changing Natural Flows of Water
4. Water Quality in Freshwater Systems
5. Water Concerns for Wildlife and Humans
6. Water and Human Communities
7. Water Solutions for Our Future

The full teacher guide is available for download. Videos accompany each chapter, also.

Mohan, Lindsey, et al. "Earth's Freshwater: A Guide for Teaching Freshwater in Grades 3 to 8." National Geographic Education. National Geographic Society, n.d. Web. 6 April 2016.

The Center for Ecoliteracy presents the Oak Woodland Learning Activity: Envisioning Relationships in an Ecosystem for grade 6 and up.

The lesson helps students to visualize and understand the complex relationships and processes of an ecosystem. "Students learn to look at an ecosystem — the oak woodland — as a system and, by doing so, become aware of relationships among living things, the processes and patterns that drive survival and evolution, and the importance of abiotic characteristics in sustaining life."

Downloadable materials include a mural by artist Ane Carla Rovetta in 15 panels, 30 information cards for use by students, and directions and discussion suggestions for instructors.

Center for Ecoliteracy. "Oak Woodland Learning Activities." Center for Ecoliteracy. Center for Ecoliteracy, 16 May 2013. Web. 28 Feb. 2016.

Clausen, Jess, and Pam Miller. Connecting with Nature: An Educational Guide for Grades Seven and Eight. Vancouver, BC: David Suzuki Foundation, 2014. PDF.