In this short unit students are introduced to erosion and propose solutions to an erosion problem on school grounds. The teacher first briefly demonstrates what erosion is, and then students investigate examples of natural or human caused erosion on the school grounds. Next, students see demonstrations of three types of erosion (here it would be better to have students investigate and experiment with these types of erosion rather than just see them). In lesson three they do some background research on types of erosion. Lesson four, the focus of this review because of the engineering design being done, has students come up with solutions for the erosion problem they found. The final lesson has students present their solutions (and while it suggests having the teacher videotape only the top three, taping all seems more appropriate).
Engineering practices underlie this series of lessons, as students investigate problems of erosion, build background knowledge, design solutions, and present their designs.
Notably, the investigation of erosion problems might not be possible on some school grounds, so teachers could instead take students on short field trip to a site in the community affected by erosion (natural or human caused). Or, teachers could take pictures of a local site affected by erosion and students could use them for the design activity, with students only coming up with design solutions, not working with community members to implement them.