Begin the lesson by discussing the incredible abilities of sniffer dogs. Highlight how their heightened sense of smell makes them invaluable in various fields such as law enforcement and search and rescue.

Explain the role of senses in animals, focusing on dogs' heightened sense of smell. Discuss how sniffer dogs are trained to detect specific scents and their importance in public safety.

Use the video 'Barking Up the Same Tree – All About Dogs' to illustrate the diversity and specialized roles of different dog breeds, enhancing students' understanding of canine abilities.

Engage students in a discussion about the various roles sniffer dogs play in law enforcement and search and rescue operations. Encourage them to think about the training and skills required for these roles.

Conduct a simulation activity where students use their sense of smell to identify different scents. This helps them appreciate the complexity and capability of sniffer dogs' olfactory senses.

Assign students to research and present on a specific role of sniffer dogs, such as detecting drugs or finding missing persons. This reinforces their understanding of the topic.

Use the assessment 'Animal Senses and Behaviors' to evaluate students' comprehension of how animals use their senses to interact with their environment.

Facilitate a class discussion reflecting on the importance of sniffer dogs in ensuring public safety and aiding in emergency situations. Encourage students to share their thoughts and insights.

Assess students' understanding with the 'External Structures for Movement' assessment, focusing on how animal structures aid in survival and function.

Encourage students to take the unit quiz to test their comprehension of the entire unit on Animal Structures and Functions.