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Subject: Biology
Semester: 2
Period: 6
Week: 34
School Name:
Teacher’s Name:
Subject: Biology
Grade Level: Grade 11
Date: Week 34
Lesson Duration: 45 minutes
Week & Term: Week 34, Period VI
Topic: Vertebrates
Sub-topic: Reptiles – General Characteristics, Internal & External Features of a Lizard, Internal Fertilization, Amniotic Egg
Learning Objectives
By the end of the lesson, learners should be able to:
- List the general characteristics of reptiles.
- Describe the external and internal features of a lizard.
- Explain internal fertilization in reptiles.
- Discuss the significance of the amniotic egg in reptile survival on land.
- Compare reptiles with amphibians.
Previous Knowledge
Learners have studied the characteristics and life cycle of amphibians (e.g. frogs) and can recall the term “metamorphosis”.
Instructional Materials
- Charts of reptile anatomy (lizard)
- Diagrams of internal and external lizard parts
- Images or models of amniotic egg
- Comparative chart of amphibians and reptiles
- Flashcards for quick review
Lesson Development – ABC Model
A – Anticipation (Warm-up / Starter)
Time: 5–10 mins
Ask: “Have you seen a lizard around your house? How does it move? Do you think it lays eggs in water like frogs?”
B – Building Knowledge (Main Lesson Body)
Time: 25–30 mins
Teacher explains:
- General Characteristics of Reptiles:
- Cold-blooded vertebrates with dry, scaly skin
- Breathe through lungs
- Most lay shelled eggs on land
- Internal fertilization
- No metamorphosis like frogs
- External Features of a Lizard:
- Scales, limbs with claws, eyelids, tail
- Internal Features of a Lizard:
- Lungs for respiration, developed circulatory system with three-chambered heart, digestive system, and reproductive organs
- Internal Fertilization:
- Male deposits sperm inside female body
- Fertilization occurs before egg is laid
- Amniotic Egg:
- Egg with a protective shell and internal membranes
- Keeps embryo moist and protected
- Important adaptation for life on land
- Comparison with Amphibians:
- Amphibians have moist skin, lay eggs in water
- Reptiles have dry skin, lay eggs on land, and do not undergo metamorphosis
Learners’ Activities (Expanded)
- Label external and internal diagrams of a lizard
- Observe and describe features of lizard models
- Compare amphibian and reptile features in a Venn diagram
- Class discussion on why reptiles are better adapted to land
C – Consolidation (Conclusion & Assessment)
Time: 5–10 mins
Wrap up with a quick group quiz:
- Name one difference between frogs and lizards
- What is the amniotic egg?
- Do reptiles lay eggs in water or on land?
🧪 Evaluation Methods
- Class oral quiz on characteristics of reptiles
- Diagram labeling assessment
- Short written paragraph comparing amphibians and reptiles
Homework / Assignment
- Draw and label a reptile's external and internal parts
- Explain the function of the amniotic egg in 3 sentences
- Interview an adult: Ask if they’ve ever seen a lizard lay eggs or where reptiles live around them
Short Notes (Expanded)
- Reptiles have scaly, dry skin and breathe with lungs.
- They lay eggs on land through internal fertilization.
- Their eggs are covered with shells and have amniotic membranes.
- Lizards are examples of reptiles with limbs and strong lungs.
- Reptiles are more successful on land than amphibians due to their waterproof skin and shelled eggs.
Differentiation / Inclusive Strategies
- Visual aids for visual learners
- Audio explanation for auditory learners
- Tactile materials (plastic models) for learners with special needs
- Advanced learners compare lizard adaptation with snakes or turtles
Teacher Reflection
- Did learners grasp the concept of the amniotic egg?
- Were they able to identify and describe lizard anatomy?
- What questions arose about reproduction and land adaptation?