Begin the lesson by introducing the concept of bacteria as one of the oldest life forms on Earth. Highlight their classification into archaea and eubacteria.

Engage students with an interesting fact about extremophiles and their ability to thrive in extreme environments.

Explain the unique characteristics of bacteria, focusing on their unicellular structure and lack of a nucleus.

Discuss the environments where archaea can be found and define the term extremophile.

Watch the video 'Characteristics of Organisms' to understand the fundamental life processes of various organisms, including bacteria.

Facilitate a discussion on the role of eubacteria in natural environments and their impact on human health.

Conduct an experiment to classify bacteria based on their shapes: coccus, bacillus, and spirillus. Use visual aids to assist in identification.

Use the 'Growing Bread Mold' assessment to explore the effect of temperature on bacterial growth, reinforcing learning through observation and analysis.

Encourage students to research and present on different types of bacteria and their roles in ecosystems.

Use the 'Bacteria, Protists and Fungi – Comprehension' assessment to evaluate students' understanding of bacterial classification and characteristics.

Reflect on the importance of bacteria in both beneficial and harmful contexts, discussing their impact on health and the environment.

Administer the 'The Six Kingdoms of Life' assessment to reinforce understanding of biological classification and organism traits.

Conclude with the unit quiz to test comprehension of the topic 'Bacteria'.