Micronutrients - Minerals

Grade 8 · Physical Education

Semester 2 | Period 4 | Week 22

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Subject: Physical Education

Semester: 2

Period: 4

Week: 22

School Name: __________________________
Teacher’s Name: ________________________
Subject: Physical Education
Grade Level: Grade 8
Date: __________________________
Lesson Duration: 45 minutes
Week & Period: Week 22, Period 4
Topic: Micronutrients – Minerals
Sub-topic: Definition, types, functions, food sources, and health effects

Learning Objectives
By the end of the lesson, students should be able to:

  1. Define minerals and classify them as major and trace minerals.
  2. Explain the functions of key minerals in the body.
  3. Identify local Liberian food sources of minerals and describe effects of deficiencies.

Previous Knowledge
Students already know:
• Basic concepts of nutrients and vitamins
• Importance of a balanced diet

Instructional Materials
• Textbook: Physical education textbooks for Grade 8
• Teaching aids: Charts showing minerals and local Liberian food sources
• Students' notebooks and writing materials

Lesson Development – ABC Model

A – Anticipation (Warm-up / Starter)
Time: 5–10 minutes
Activity: The teacher will ask the class:
• What minerals do you know and in which foods are they found?
• How do you feel when you are weak, tired, or prone to illness?
The teacher will record their responses on the board.

Teacher’s Role: Guide discussion, clarify misconceptions, and introduce minerals.
Learner’s Role:
• Share existing knowledge about minerals and their sources.
• Participate actively in discussion.

B – Building Knowledge (Main Lesson Body)

Time: 25–30 minutes

Teacher’s Role (Expanded):

  1. Introduction to Minerals:
    • Define minerals as essential inorganic nutrients required in small amounts for proper growth, health, and daily activity.
    • Explain that unlike vitamins, minerals are not organic and cannot be made by the body; they must be obtained from food.
  2. Classification of Minerals:
    • Major minerals: Required in relatively larger amounts. Examples: calcium, potassium, magnesium.
    • Trace minerals: Required in very small amounts but essential for health. Examples: iron, zinc, iodine.
  3. Key Functions of Minerals:
    • Calcium: Strengthens bones and teeth; aids muscle contraction and nerve function.
    • Potassium: Maintains fluid balance; supports nerve transmission and muscle contraction.
    • Magnesium: Supports enzyme activity, energy production, and muscle relaxation.
    • Iron: Forms hemoglobin for oxygen transport; prevents anemia.
    • Zinc: Supports immunity, wound healing, and normal growth.
    • Iodine: Needed for thyroid hormone production, which regulates metabolism.
  4. Food Sources (Local Liberian Examples):
    • Calcium: Cassava leaves, small fish eaten with bones, milk, eggshell powder (fortified).
    • Potassium: Plantains, yams, green vegetables, tomatoes.
    • Magnesium: Nuts, beans, green leafy vegetables like kontomire or cassava leaves.
    • Iron: Red meat, fish, beans, fortified cereals or grains.
    • Zinc: Fish, eggs, groundnuts, shellfish.
    • Iodine: Iodized salt, seafood (shrimp, crabs, fish).
  5. Effects of Deficiencies:
    • Calcium: Weak bones, stunted growth, dental problems, muscle cramps.
    • Potassium: Fatigue, muscle weakness, irregular heartbeat.
    • Magnesium: Muscle twitches, fatigue, poor energy production.
    • Iron: Anemia, pale skin, fatigue, reduced learning ability.
    • Zinc: Poor immunity, slow wound healing, growth delays.
    • Iodine: Goiter (enlarged thyroid), slow metabolism, developmental issues in children.
  6. Practical Relevance:
    • Link minerals to school performance: iron for concentration, calcium for strong bones to support activity.
    • Link to sports and physical activities: magnesium and potassium for muscle function, zinc for recovery.
    • Highlight locally available foods to ensure learners can apply knowledge in daily life.
  7. Interactive Demonstration:
    • Display charts, diagrams, and real food examples showing minerals and sources.
    • Ask learners to identify minerals in foods they commonly eat.
    • Discuss how a combination of foods ensures adequate mineral intake

 

Learners’ Activities (Expanded):

  • Observe charts, diagrams, and examples of local mineral-rich foods.
  • Take notes on functions, sources, and deficiency effects.
  • Discuss in groups which local foods they eat regularly provide major and trace minerals.
  • Identify foods in their meals that support growth, immunity, and physical performance.
  • Optional: create a one-day meal plan covering at least three major and two trace minerals.

 

Assessment Checks (Expanded & Interactive):

  • Ask learners to name one major and one trace mineral, its function, and a local food source.
  • Observe participation and ability to link minerals to growth, health, school, and sports performance.
  • Mini activity: show a picture of a food and ask learners to identify the minerals it contains.
  • Check understanding of deficiency consequences and prevention strategies.

 

Notes (Expanded & Detailed):

  • Emphasize the importance of minerals for healthy growth, learning, immunity, and energy.
  • Highlight culturally relevant, locally available foods for easier comprehension and application.
  • Discuss practical consequences of deficiencies: weak bones, anemia, poor concentration, slow recovery from exercise.
  • Stress preventive measures: include a variety of mineral-rich foods in daily meals and use iodized salt.
  • Reinforce that minerals work together with vitamins and macronutrients for overall health and optimal performance.

 

C – Consolidation (Conclusion & Assessment)
Time: 5–10 minutes
Summary:
• Teacher asks students to recall major and trace minerals and their key functions.
• Students summarize local food sources and consequences of deficiencies.

Evaluation Method (Expanded):
• Exit slip/quiz: Students write short answers to:
• Name one major and one trace mineral.
• Give one local Liberian food source for each.
• Explain one effect of deficiency for any mineral.
• Teacher collects and quickly reviews answers for understanding.
• Provide oral feedback before class ends.

Assignment (Expanded):
Follow-up Activity:
• Students prepare a table showing six key minerals, their functions, local Liberian food sources, and deficiency effects.
• Observe and report which minerals are present in their daily meals.

Differentiation / Inclusive Strategies
• Struggling Learners: Provide pre-labeled charts of minerals and sources.
• Advanced Learners: Encourage discussion on the role of minerals in athletic performance and disease prevention.
• Students with Disabilities: Use visual aids, enlarged charts, and one-on-one guidance to identify minerals and sources.

Teacher’s Reflection (After Class)
• What worked well? ______________________________________________________
• What needs improvement? _________________________________________________
• Students’ engagement level: □ High □ Medium □ Low