This teacher guide and student workbook set contains two learning activities, designed for fifth through ninth grade students, that concentrate on the adaptations of shorebird beaks for a variety of habitats and food sources, and the effect of toxic chemicals in the food chain on the birds. In activity A, students discover how shorebirds are…

This teacher guide and student workbook set contains two learning activities, designed for fifth through ninth grade students, that concentrate on lake stratification and water quality. In the activities students model the seasonal temperature changes that occur in temperate lakes and observe the resulting stratification of lake waters. Students…

This teacher guide and student workbook set presents two learning activities, designed for fifth through ninth grade students, that concentrate on nutrients in the Great Lakes. In activity A, students simulate aquatic habitats using lake water and goldfish in glass jars and observe the effects of nutrient loading and nutrient limitation on aquatic…