Introduce the lesson by outlining the importance of understanding how endocrine blockers affect both the environment and human health. Mention that today's session will include interactive elements and a group discussion.

Discuss what endocrine blockers are, their sources, and why they matter. Keep the language simple as this is for 9th grade students.

Play the introductory video that covers endocrine disruptors to provide a visual and engaging explanation of the topic. Ensure the video is accessible and prompts students to note down key points.

Direct students to work on the Environmental Impact Worksheet. Explain that they can work individually or in pairs and encourage them to focus on how endocrine blockers affect both ecosystems and human health.

Facilitate a group discussion by asking each group to share their findings. Summarize key points about the environmental and human health impacts of endocrine blockers.