Begin the lesson by introducing the concept of cells as the building blocks of life. Discuss the diversity of organisms on Earth, from unicellular to multicellular, and emphasize that all organisms are made of cells.

Explain the differences between unicellular and multicellular organisms, highlighting how unicellular organisms can perform all life functions independently.

Describe how specialized cells in multicellular organisms work together for the organism’s survival.

Watch the video 'Characteristics of Organisms' to understand the fundamental characteristics of life and how cells play a role in these processes.

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

Conduct an experiment to observe yeast cells in action, demonstrating cellular respiration. This hands-on activity helps students visualize how cells convert glucose and oxygen into energy.

Assign the 'Animal and Plant Cells – Comprehension' worksheet to reinforce understanding of cell structures and their functions.

Use the 'Bacteria, Protists and Fungi – Comprehension' assessment to evaluate students' understanding of unicellular organisms and their characteristics.

Engage students in a discussion about how cells contribute to the life processes of organisms. Encourage them to reflect on the roles of different cell types in multicellular organisms.

Administer the 'Cellular Respiration' assessment to test comprehension of how cells produce energy.

Conclude with the unit quiz to assess overall understanding of the topic 'Cells'.