Begin the lesson by exploring the fascinating world of cnidarians, highlighting their unique characteristics and habitats. Use the introductory video 'All About Cnidarians' to engage students with visual examples of jellyfish and corals.

Discuss the basic characteristics of cnidarians, including their radial symmetry and stinging cells called cnidocytes. Highlight the differences between jellyfish and corals, and explain their roles in marine ecosystems.

Use the video 'All About Jellyfish' to delve deeper into the life cycle and movement patterns of jellyfish, enhancing students' understanding of these unique creatures.

Engage students in a discussion about the habitats of cnidarians and their ecological importance. Encourage them to identify different cnidarians and their adaptations to aquatic environments.

Have students classify images of cnidarians, such as jellyfish and corals, using the 'Cnidarians Fact Sheet' assessment. This activity will reinforce their understanding of cnidarian characteristics and classification.

Assign students to research a specific cnidarian species, focusing on its habitat, diet, and reproduction methods. Encourage them to present their findings to the class.

Conduct a quick quiz to assess students' comprehension of cnidarian characteristics, life cycles, and ecological roles.

Facilitate a class discussion to reflect on the learning objectives, encouraging students to share what they found most interesting about cnidarians and their roles in marine ecosystems.

Use the 'Classifying Animals in the Schoolyard' assessment to extend learning by having students classify other animals based on observed characteristics, reinforcing their understanding of animal classification.