Introduce the lesson by welcoming students and setting the tone. Explain that today the focus is on gratitude and how small positive actions can create a bigger positive chain reaction across the classroom.

Explain the concept of gratitude. Share simple examples from everyday life. Encourage students to think of times they felt thankful.

Illustrate how one act can lead to another. Use visuals to depict a chain reaction. Ask students to imagine how their kind note could start a positive reaction in the classroom.

Guide students in reflecting on the activity. Encourage sharing of feelings and insights from expressing gratitude during the activity. Summarize key points and reinforce the idea of a 'gratitude chain reaction.'