Begin the lesson by discussing the importance of the Sun in ecosystems. Highlight how the Sun provides the initial energy source for all living organisms.

Introduce the concept of food chains using a wetland ecosystem as an example. Explain how energy flows through different levels of consumers.

Explain the roles of producers, consumers, and decomposers in an ecosystem. Use diagrams to illustrate the flow of energy.

Watch the video 'Energy Flow in Ecosystems' to understand how energy is transferred through different levels. This video provides clear demonstrations and examples.

Engage students in identifying different levels of consumers in a food chain. Discuss examples of primary, secondary, and tertiary consumers.

Watch the video 'Ecosystem Organisation' to explore how organisms interact within ecosystems. This video helps in understanding ecosystem balance.

Have students create a simple food chain using cut-out images of organisms. Encourage them to label each level and describe the energy flow.

Use the 'Producers to Decomposers' assessment to reinforce understanding of ecosystem roles. This activity involves labeling images and categorizing organisms.

Assign students to draw their own food chains, including producers, consumers, and decomposers. Encourage creativity and accuracy in depicting energy flow.

Conduct a class discussion to review the roles of the Sun, producers, consumers, and decomposers in ecosystems. Ask students to provide examples.

Reflect on the importance of each component in a food chain. Discuss how changes in one part of the chain can affect the entire ecosystem.

Use the 'Food Chains' assessment to evaluate students' understanding of energy pathways in ecosystems. This activity involves ordering organisms and labeling them.

Encourage students to explore more about food webs and energy pyramids through additional resources and activities.