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Subject: Biology
Semester: 1
Period: 2
Week: 9
School Name:
Teacher’s Name:
Subject: Biology
Grade Level: Grade 10
Date: Week 9
Lesson Duration: 45 minutes
Week & Term: Week 9, Period 2
Topic: The Hierarchy and Diversity of Living Things
Sub-topic: Unicellular Organisms – STI-Causing Agents (Fungi, Bacteria, Viruses, Protozoa)
Learning Objectives
By the end of the lesson, students should be able to:
- Define unicellular organisms
- Identify different unicellular organisms that cause diseases
- Describe how certain STIs are caused by these microorganisms
- Explain methods of preventing these infections
Previous Knowledge
Students already know:
• Classification of living things
• The characteristics of living organisms
Instructional Materials
• Diagrams of microorganisms
• Flashcards with disease names and their agents
• Chart showing STIs and their symptoms
• Notebook, projector (optional)
Lesson Development – ABC Model
A – Anticipation (Warm-up / Starter)
Time: 5–10 mins
Ask: “Do you think all diseases are caused by the same kind of germ?”
Allow students to brainstorm what causes sickness and how infections spread.
B – Building Knowledge (Main Lesson Body)
Time: 25–30 mins
Teacher explains that:
- Unicellular organisms are living things made up of one cell.
- These include bacteria, protozoa, fungi, and viruses.
- Some unicellular organisms can cause diseases, including Sexually Transmitted Infections (STIs).
The following STIs and their agents are introduced:
- Bacteria: Neisseria gonorrhoeae (gonorrhea), Treponema pallidum (syphilis)
- Viruses: HIV (AIDS), HPV (genital warts)
- Fungi: Candida albicans (vaginal yeast infection)
- Protozoa: Trichomonas vaginalis (trichomoniasis)
Learners’ Activities (Expanded):
- In groups, students match STI names with their causative agents
- Draw a diagram of one microorganism they studied
- Role-play doctor-patient interactions explaining symptoms and prevention
- Discuss: “What are safe ways to prevent STIs?”
Assessment Checks:
- Class-wide matching exercise
- Teacher asks rapid-fire questions to individual students
- Peer correction of facts
Notes (Expanded & Detailed):
- Unicellular organisms are responsible for many diseases because they multiply quickly and adapt to their environments.
- Bacteria are prokaryotic cells; some are harmless, others cause diseases.
- Viruses are not fully alive—they can’t reproduce on their own and need a host.
- Fungi like yeast can become harmful under certain conditions.
- Protozoa are animal-like, often parasitic, and live in moist environments.
- STIs can cause long-term harm if untreated, such as infertility or death (in the case of AIDS).
- Prevention methods include abstinence, condom use, proper hygiene, and early treatment.
C – Consolidation (Conclusion & Assessment)
Time: 5–10 mins
Teacher asks:
- “What is a unicellular organism?”
- “Which microorganism causes HIV?”
- “What’s the difference between a bacteria and a virus?”
Evaluation Method (Expanded):
- Students write short responses to:
- Name 3 STIs and the microbes that cause them
- Describe how each can be prevented
- Choose one microbe and draw it, labeling parts if possible
Assignment (Expanded):
- Create a one-page fact sheet on one STI-causing agent (e.g., Gonorrhea). Include:
- Name of the disease
- Microorganism that causes it
- Mode of transmission
- Symptoms
- Prevention methods
- Add an illustration of the microorganism if possible
Follow-up Activity:
- Prepare a group health talk presentation next week
Differentiation / Inclusive Strategies
• Struggling Learners: Focus on just two agents and diseases
• Advanced Learners: Research resistance in bacteria (e.g., antibiotic resistance)
• Students with Disabilities: Use picture-based flashcards and guided reading
Teacher’s Reflection (After Class)
• What worked well?
• What needs improvement?
• Students’ engagement level: □ High □ Medium □ Low
• Next steps: Explore parasitic protozoa and non-STI-related diseases