Summarize key information and investigate how beaver dams filter water.
• Ask: How do you think beavers affect their environment? Encourage students to share observations from the text features and their own prior knowledge.
• Read the article aloud, pausing to discuss information about beavers and how they affect their environment.
• After reading, revisit the question: How do beavers impact their environment, including people and other animals? Remind students to use evidence in their responses. (Answers may include that beaver dams help create wetlands that provide habitat for fish, frogs and birds; beavers cut down trees; and beavers can cause flooding on roads.)
• Introduce the hands-on investigation “Filter Test” (page 7) to model how beaver dams filter water pollution. If possible, provide a variety of filters, including some with larger holes.