Begin with a thought-provoking question: 'How small do you think the smallest living organism is?' This will engage students' curiosity about the diversity of life.

Introduce the concept of cells as the building blocks of life, using the example of Robert Hooke's discovery of cells.

Explain the differences between unicellular and multicellular organisms, highlighting examples such as amoebas and humans.

Discuss the role of chloroplasts in plant cells and the process of photosynthesis.

Watch the 'Characteristics of Organisms' video to understand the fundamental characteristics of life and how they relate to cells.

Explore the 'Observing the Cell Membrane of an Animal Cell' video to visualize the structure and function of cell membranes.

Conduct a simple experiment to observe cellular respiration using yeast, sugar, and balloons. This hands-on activity helps students visualize how cells convert glucose and oxygen into energy.

Use microscopes to examine prepared slides of plant and animal cells, encouraging students to identify and compare cell structures.

Assign the 'A Closer Look at Cells' worksheet to reinforce understanding of cell structures and their functions.

Facilitate a class discussion to review key concepts, such as the differences between unicellular and multicellular organisms and the role of chloroplasts.

Encourage students to reflect on what they have learned about cells and their importance in life processes. Have them write a short paragraph summarizing their understanding.

Use the 'Cells – Comprehension' assessment to evaluate students' understanding of the concepts covered in the lesson.

Encourage students to take the Unit Quiz to test their comprehension of the entire Diversity of Life unit.