The key lists a sequence of questions. Each key should offer a choice of a yes or no answer. Next, distribute copies of the animal illustrations. Discuss the similarities and differences of these animals. Separate students into cooperative learning groups.
Students compare body parts, habitats, and behaviors of the animals.
Each group indentifies and lists as many similar characteristics as they can. Students create dichotomous keys for the animals they've just discussed. Share they keys that the students come up with about these animals, and discuss how and why animals are placed into different categories even though they share similar physical characteristics. Inc. All Rights Reserved.