Class: Senior Secondary School 1 (SS1, SS 1, SSS1, SSS 1)
Term: 2nd Term
Week: 2
Age: 15 years
Duration: 45 minutes
Subject: Home Management
Curriculum Theme: Home Management
Previous Lesson: Communication in the Family: Roles, Barriers and Devices.
Topic: Food Nutrients
Subject Matter: meaning of food nutrients, types of nutrients, sources of nutrients, functions of nutrients, deficiency of each nutrient

Specific Objectives

By the end of the lesson, pupils should be able to:

Cognitive Domain:

Define food nutrients.
List the six classes of food nutrients.
State at least two sources for each class of nutrient.
Explain at least two functions of each class of nutrient.
Mention at least one deficiency symptom for major nutrients.

Affective Domain:

Appreciate the importance of a balanced diet for good health.
Value the role of different food nutrients in the body.
Show interest in identifying nutrient-rich foods.

Psychomotor Domain:

Identify various food items and classify them according to their nutrient content.
Prepare a simple chart showing sources of different nutrients.

Participate actively in discussions about healthy eating habits.
Share knowledge about food nutrients with peers.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum for Home Economics.
State Unified Scheme of Work for Senior Secondary School Home Management.
Home Management for Senior Secondary Schools, Book 1.
https://www.who.int/news-room/fact-sheets/detail/healthy-diet
https://www.nutrition.gov/topics/basic-nutrition/myplate

Instructional Materials

The teacher will teach this lesson with the aid of:

Charts showing different food nutrients and their sources.
Pictures of various food items.
Real food items such as yam, rice, beans, palm oil, eggs, fruits, and vegetables.

Rationale for the Lesson

This lesson helps pupils understand the essential components of the food they eat and their importance for growth and good health. It enables them to make informed choices about their diet, which can prevent malnutrition and promote well-being in their daily lives.

Prerequisite/Previous Knowledge

Pupils have basic knowledge of different types of food and their general importance from their primary school science lessons.

Lesson Content/Board Summary

Food Nutrients

Meaning of Food Nutrients

Food nutrients are chemical substances present in food that are essential for the maintenance of life and for growth, reproduction, and health. They provide energy, building materials, and help regulate body processes.

Types of Food Nutrients

Food nutrients are generally classified into six main classes:

Carbohydrates
Proteins
Fats and Oils
Vitamins
Minerals
Water

Carbohydrates

Carbohydrates are the body’s main source of energy. They are broadly classified into simple (sugars) and complex (starches and fibre).

Sources of carbohydrates include:

Staple foods: Yam, cassava, rice, maize, potatoes, plantain.
Sugars: Honey, fruits, soft drinks, sweets.

Functions of carbohydrates are:

Provide energy for daily activities and body functions.
Spare protein from being used for energy.
Fibre (a type of carbohydrate) aids digestion and prevents constipation.

Deficiency of carbohydrates can lead to:

Lack of energy.
Weight loss.
Weakness and fatigue.

Proteins

Proteins are body-building foods essential for growth and repair of tissues.

Sources of proteins include:

Animal sources: Meat, fish, eggs, milk, cheese, poultry.
Plant sources: Beans, groundnuts, soyabeans, lentils, peas.

Functions of proteins are:

Build and repair body tissues.
Produce enzymes, hormones, and antibodies.
Provide a secondary source of energy when carbohydrates and fats are insufficient.

Deficiency of proteins can lead to:

Kwashiorkor (swelling, stunted growth).
Marasmus (severe wasting, muscle loss).
Poor wound healing.

Fats and Oils

Fats and oils are concentrated sources of energy and help in the absorption of fat-soluble vitamins.

Sources of fats and oils include:

Animal fats: Butter, lard, fatty meats, cream.
Vegetable oils: Palm oil, groundnut oil, coconut oil, olive oil, margarine.
Nuts and seeds: Groundnuts, cashews, melon seeds.

Functions of fats and oils are:

Provide a concentrated source of energy.
Protect internal organs and insulate the body against cold.
Aid in the absorption of fat-soluble vitamins (A, D, E, K).

Deficiency of fats and oils can lead to:

Weight loss.
Fatigue.
Deficiency of fat-soluble vitamins.

Vitamins

Vitamins are organic compounds required in small quantities for various metabolic processes and overall health.

Types of vitamins and their sources/functions/deficiencies include:

Vitamin A:
- Sources: Carrots, leafy green vegetables, liver, eggs, milk.
- Functions: Good vision, healthy skin, immune function.
- Deficiency: Night blindness, dry skin.
Vitamin B Complex:
- Sources: Whole grains, meat, fish, eggs, legumes.
- Functions: Energy metabolism, nerve function.
- Deficiency: Beri-beri (B1), Pellagra (B3), anaemia.
Vitamin C:
- Sources: Citrus fruits, tomatoes, bell peppers, leafy greens.
- Functions: Immune system, collagen formation, wound healing.
- Deficiency: Scurvy (bleeding gums, weakness).
Vitamin D:
- Sources: Sunlight exposure, fatty fish, fortified milk.
- Functions: Calcium absorption, bone health.
- Deficiency: Rickets (in children), osteomalacia (in adults).

Minerals

Minerals are inorganic elements required for various body functions, including bone formation, nerve function, and fluid balance.

Types of minerals and their sources/functions/deficiencies include:

Calcium:
- Sources: Milk, cheese, leafy greens, fortified foods.
- Functions: Strong bones and teeth, muscle contraction, blood clotting.
- Deficiency: Osteoporosis, poor bone development.
Iron:
- Sources: Red meat, liver, beans, leafy green vegetables.
- Functions: Formation of haemoglobin (carries oxygen in blood).
- Deficiency: Anaemia (fatigue, weakness).
Iodine:
- Sources: Seafood, iodized salt.
- Functions: Thyroid hormone production, regulates metabolism.
- Deficiency: Goitre (enlarged thyroid gland), mental retardation.

Water

Water is essential for life, making up a large percentage of body weight.

Sources of water include:

Drinking water.
Beverages (juices, milk).
Foods with high water content (fruits, vegetables).

Functions of water are:

Regulates body temperature.
Transports nutrients and oxygen to cells.
Removes waste products.
Lubricates joints.

Deficiency of water can lead to:

Dehydration.
Fatigue, dizziness.
Impaired body functions.

Teaching Methods/Instructional Techniques

Discussion, Lecture, Demonstration, Question and Answer, Visual Aids

Instructional Procedures

Step 1: Introduction

Time: 5 minutes
Teaching Skill: Set Induction
Teacher’s Activity: The teacher greets the pupils and asks them to mention some of the foods they ate for breakfast. The teacher then asks what makes these foods good for their body.
Pupils’ Activity: Pupils mention foods they ate and respond to the question about the benefits of food.
Learning Point: Pupils are introduced to the concept of food components and their importance.

Step 2: Meaning of Food Nutrients

Time: 5 minutes
Teaching Skill: Explanation/Definition
Teacher’s Activity: The teacher explains the meaning of food nutrients, stating that they are chemical substances in food necessary for life, growth, and health. The teacher writes the definition on the board.
Pupils’ Activity: Pupils listen attentively and copy the definition into their notes.
Learning Point: Pupils understand what food nutrients are.

Step 3: Types of Food Nutrients

Time: 5 minutes
Teaching Skill: Listing/Classification
Teacher’s Activity: The teacher introduces the six main classes of food nutrients (Carbohydrates, Proteins, Fats and Oils, Vitamins, Minerals, Water) and writes them on the board.
Pupils’ Activity: Pupils identify and list the six classes of food nutrients.
Learning Point: Pupils can recall the major types of food nutrients.

Step 4: Sources of Nutrients

Time: 10 minutes
Teaching Skill: Demonstration/Discussion
Teacher’s Activity: The teacher uses charts, pictures, and real food items to show and discuss sources of each nutrient class. For example, showing yam for carbohydrates, beans for protein, palm oil for fats, oranges for Vitamin C, etc. Pupils are asked to identify more sources.
Pupils’ Activity: Pupils observe the materials, identify food items, and contribute to the discussion by mentioning other sources of nutrients.
Learning Point: Pupils can identify various food sources for each nutrient class.

Step 5: Functions of Nutrients

Time: 10 minutes
Teaching Skill: Explanation/Questioning
Teacher’s Activity: The teacher explains the main functions of each nutrient class, asking pupils questions to ensure understanding. For example, “What do carbohydrates do for our body?” “Why do children need a lot of protein?”
Pupils’ Activity: Pupils listen and answer questions, explaining the roles of different nutrients in the body.
Learning Point: Pupils understand the specific roles each nutrient plays in maintaining health and growth.

Step 6: Deficiency of Nutrients

Time: 5 minutes
Teaching Skill: Explanation/Illustrating
Teacher’s Activity: The teacher discusses common deficiency symptoms associated with a lack of major nutrients, such as night blindness for Vitamin A, anaemia for iron, and Kwashiorkor for protein. The teacher emphasizes the importance of a balanced diet.
Pupils’ Activity: Pupils listen and ask questions for clarification, understanding the consequences of nutrient deficiencies.
Learning Point: Pupils understand the health problems caused by inadequate intake of certain nutrients.

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

Define food nutrients.
List the six main classes of food nutrients.
Mention two sources and two functions of protein.
State one deficiency symptom of Vitamin C.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 5 minutes
Teaching Skill: Summarization/Assignment
Teacher’s Activity: The teacher summarizes the key points of the lesson, reinforcing the importance of consuming a variety of foods for a balanced diet. The teacher gives homework: “Research and write down two Nigerian dishes that are rich in carbohydrates and two that are rich in protein.”
Pupils’ Activity: Pupils listen to the summary and copy the homework assignment.
Learning Point: Pupils consolidate their learning and are encouraged to apply it.

Lesson Keywords

Nutrients – Chemical substances in food essential for life and health.
Carbohydrates – Energy-giving foods like yam, rice, sugar.
Proteins – Body-building foods like meat, fish, beans.
Fats and Oils – Concentrated energy sources like palm oil, butter.
Vitamins – Organic compounds needed in small amounts for body functions.
Minerals – Inorganic elements needed for various body processes like bone formation.
Deficiency – A lack of something, especially a nutrient, leading to health problems.

Differentiation

For pupils who grasp concepts quickly, they can be asked to research specific micronutrient deficiencies prevalent in Nigeria. For those who need more support, the teacher can provide simpler charts with fewer food items and focus on the most common nutrients and their sources.

Note for teachers using this lesson plan

Encourage pupils to bring empty food wrappers to class to identify nutrient information. Emphasize that a balanced diet involves variety and moderation, not just individual nutrients. Use local food examples as much as possible to make the lesson relatable.