Foods and nutrition and Its Importance for SS 1

Class: SS 1
Term: First Term
Week: 1
Age: 15 years
Duration: 60 minutes
Subject: Food and Nutrition
Curriculum Theme: Food Nutrients for Healthy Living
Focal competence: Applying knowledge of food nutrients based on their composition for healthy meal planning
Key competencies/values: Collaboration; ICT and Digital Competencies; Digital Competencies
Skills:

• Identifying signs and effects of poor nutrition
• Classifying foods based on their origin, nutrient content and functions

Previous Lesson:
Topic: Introduction To Foods And Nutrition
Subject Matter: Meaning and importance of foods and nutrition

Specific Objectives

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

Cognitive Domain

• Define foods and nutrition.
• Explain the importance of foods and nutrition.
• Explain the roles foods play in the human body.
• Identify signs and effects of poor nutrition.
• Classify foods based on their origin, nutrient content, and functions.

Affective Domain

• Appreciate the importance of good nutrition for healthy living.
• Show interest in learning more about food and nutrition.

Psychomotor Domain

• Draw simple charts illustrating food classification.
• Demonstrate the ability to classify common foods.

Social Domain

• Participate actively in group discussions on food and nutrition.
• Collaborate with peers to classify foods.

Reference Materials

The following resources were used in planning this lesson:

• 2025 New Revised Senior Secondary Education Curriculum (SSEC)
• Relevant State Unified Scheme of Work
• Food and Nutrition for Senior Secondary Schools (A suitable textbook)
• The HeadTeacher Scheme of work For The New Revised Senior Secondary Education Curriculum (SSEC)

Instructional Materials

The teacher will teach this lesson with the aid of:

• Charts/posters showing food classification
• Internet-enabled devices (e.g., projector, computer, tablets)
• Video clips on food and nutrition
• Pictures of various food items

Rationale for the Lesson

This lesson is essential as it lays the foundation for understanding healthy eating habits and lifestyle choices. It helps students grasp the basic concepts of food and nutrition, enabling them to make informed decisions about their diet. Understanding these concepts supports overall well-being and prevents diet-related health issues.

Prerequisite/Previous Knowledge

Students should have a basic understanding of common food items and their general uses from their Junior Secondary School (JSS) Home Economics classes.

Lesson Content/Board Summary

Introduction To Foods And Nutrition

Meaning of Food

Food refers to any edible substance, usually solid or liquid, that nourishes the body. It is consumed by living organisms to provide energy, promote growth, repair tissues, and maintain life processes. Food can be derived from plants or animals.

Meaning of Nutrition

Nutrition is the process by which living organisms obtain and use food for growth, metabolism, and repair. It involves the intake of food, digestion, absorption, assimilation, and excretion. Good nutrition is essential for maintaining health and preventing diseases.

Nutrients: These are chemical substances in food that the body needs to function properly. They include carbohydrates, proteins, fats, vitamins, minerals, and water.

Balanced Diet: This is a diet that contains all the essential nutrients in the right proportions to meet the body’s needs for growth, energy, and maintenance of health.

Importance of Foods and Nutrition

Foods and good nutrition are crucial for several reasons:

1. Provides Energy: Food supplies the energy needed for all bodily functions, including movement, breathing, and thinking.
2. Promotes Growth and Development: Nutrients like proteins are vital for building and repairing body tissues, especially during childhood and adolescence.
3. Maintains Health: Vitamins and minerals boost the immune system, protecting the body from diseases and infections.
4. Repairs and Replaces Tissues: Food helps in the constant renewal of cells and tissues throughout the body.
5. Regulates Body Processes: Nutrients play a role in regulating various bodily functions, such as blood pressure, body temperature, and digestion.
6. Enhances Mental Function: Proper nutrition supports brain development and cognitive function, leading to better concentration and academic performance.

Roles of Food in the Human Body

Food plays three main roles in the human body:

1. Energy-giving foods: These foods provide the body with the energy it needs to perform daily activities. Examples include carbohydrates (yam, rice, maize, bread) and fats/oils (groundnut oil, butter, palm oil).
2. Body-building foods: These foods are essential for growth, repair of worn-out tissues, and building new cells. Examples include proteins (meat, fish, eggs, beans, milk).
3. Protective foods: These foods help to protect the body from diseases and regulate body processes. Examples include vitamins and minerals found in fruits (oranges, mangoes) and vegetables (spinach, ugu).

Classification of Foods

Foods can be classified in various ways, including by origin, nutrient content, and function.

Classification by Origin

Foods can be classified based on where they come from:

1. Plant Origin: Foods derived from plants.
   • Cereals: Rice, maize, millet, wheat
   • Legumes: Beans, groundnuts, soybeans
   • Fruits: Oranges, apples, mangoes, bananas
   • Vegetables: Spinach, cabbage, tomatoes, onions
   • Roots and Tubers: Yam, cassava, potato, cocoyam
2. Animal Origin: Foods derived from animals.
   • Meat: Beef, goat meat, chicken
   • Fish: Tilapia, mackerel, catfish
   • Eggs: Chicken eggs, quail eggs
   • Milk and Dairy Products: Cow milk, yoghurt, cheese

Classification by Nutrient Content

Foods are grouped according to the predominant nutrient they provide:

1. Carbohydrates: Yam, rice, cassava, maize, bread, sugar.
2. Proteins: Meat, fish, eggs, beans, milk, groundnuts.
3. Fats and Oils: Palm oil, groundnut oil, butter, margarine, avocado.
4. Vitamins: Fruits (oranges, pawpaw), vegetables (carrots, spinach).
5. Minerals: Green leafy vegetables, milk, salt, fish.
6. Water: Drinking water, fruits, vegetables.

Classification by Function

This classification is similar to the “Roles of Food in the Human Body” and groups foods based on what they do for the body:

1. Energy-giving foods: Carbohydrates and Fats (e.g., yam, rice, palm oil).
2. Body-building foods: Proteins (e.g., meat, beans, fish).
3. Protective foods: Vitamins and Minerals (e.g., fruits, vegetables).

Consequences of Poor Nutrition

Poor nutrition, also known as malnutrition, can lead to several health problems:

1. Under-nutrition: Occurs when the body does not get enough nutrients.
   • Kwashiorkor: Caused by severe protein deficiency, common in children, leading to swollen abdomen, stunted growth, and skin changes.
   • Marasmus: Caused by severe deficiency of both protein and calories, leading to extreme thinness, muscle wasting, and stunted growth.
   • Anaemia: Caused by iron deficiency, leading to fatigue, weakness, and pale skin.
   • Vitamin Deficiencies: Can lead to conditions like night blindness (Vitamin A), scurvy (Vitamin C), and rickets (Vitamin D).
2. Over-nutrition: Occurs when the body takes in too many nutrients, especially calories.
   • Obesity: Excessive accumulation of body fat, leading to increased risk of heart disease, diabetes, and high blood pressure.
   • Type 2 Diabetes: Often linked to excessive sugar and calorie intake.
   • Heart Disease: High intake of unhealthy fats can lead to high cholesterol and heart problems.

Careers in Food and Nutrition

The field of food and nutrition offers various career opportunities:

1. Dietitian/Nutritionist: Provides expert advice on diet and nutrition to individuals and groups.
2. Food Scientist/Technologist: Works on developing new food products, improving food safety, and processing methods.
3. Catering Manager: Manages food services in hotels, hospitals, schools, or other institutions.
4. Home Economist: Educates individuals and families on various aspects of home management, including nutrition.
5. Public Health Nutritionist: Works to improve the nutritional health of communities through education and policy development.
6. Food Journalist/Writer: Creates content about food, recipes, and nutrition for various media.

Teaching Methods/Instructional Techniques

Discussion, Explanation, Question and Answer, Group Work, Demonstration, Visual Aids (charts, videos)

Instructional Procedures

Step 1: Introduction

Time: 5 minutes

Teaching Skill: Questioning/Engaging

Teacher’s Activity: The teacher greets the students and asks them what they had for breakfast or lunch, and why they eat food. The teacher then introduces the topic: “Introduction to Foods and Nutrition.”

Pupils’ Activity: Pupils respond to the questions and listen attentively to the introduction.

Learning Point: Prior knowledge activation

Step 2: Meaning of Food and Nutrition

Time: 10 minutes

Teaching Skill: Explanation/Definition

Teacher’s Activity: The teacher defines “food” and “nutrition” using simple language and practical examples. The teacher also clarifies terms like “nutrients” and “balanced diet.”

Pupils’ Activity: Pupils listen, ask questions for clarification, and contribute examples of food items.

Learning Point: Food and nutrition definitions

Step 3: Importance and Roles of Food

Time: 10 minutes

Teaching Skill: Discussion/Elaboration

Teacher’s Activity: The teacher guides students to brainstorm in groups on the importance of food and nutrition. The teacher then explains the three main roles of food in the human body (energy-giving, body-building, protective) with examples.

Pupils’ Activity: Pupils discuss in groups, share their ideas, and identify the roles of different foods.

Learning Point: Food’s importance and roles

Step 4: Classification of Foods (by Origin)

Time: 8 minutes

Teaching Skill: Visual Aid/Classification

Teacher’s Activity: The teacher displays charts/posters showing various food items and guides students to classify familiar foods according to their origin (plant or animal). The teacher provides clear examples for each category.

Pupils’ Activity: Pupils observe the charts, participate in classifying foods, and provide their own examples.

Learning Point: Food classification by origin

Step 5: Classification of Foods (by Nutrient Content and Function)

Time: 8 minutes

Teaching Skill: Guided Practice/Categorisation

Teacher’s Activity: The teacher further guides students to classify foods based on their nutrient content (carbohydrates, proteins, fats, vitamins, minerals, water) and function (energy, body-building, protective), linking back to the roles discussed earlier.

Pupils’ Activity: Pupils actively classify foods into different nutrient and functional groups, using examples from their daily diet.

Learning Point: Food classification by nutrients

Step 6: Consequences of Poor Nutrition and Careers

Time: 9 minutes

Teaching Skill: Explanation/Awareness

Teacher’s Activity: The teacher uses video clips or internet-enabled devices to explore the consequences of poor nutrition (e.g., Kwashiorkor, Marasmus, Obesity). The teacher also briefly introduces potential careers in Food and Nutrition.

Pupils’ Activity: Pupils watch the video clips, ask questions, and discuss the health implications of poor nutrition. They also note down potential career paths.

Learning Point: Poor nutrition effects, careers

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

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

1. What is food?
2. Define nutrition.
3. Mention two importance of food to the human body.
4. Give two examples of energy-giving foods.
5. Classify yam and fish by origin and nutrient content.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Lesson understanding assessed

Step 8: Note-Taking

Time: 10 minutes

Teaching Skill: Guided Writing

Teacher’s Activity: The teacher guides pupils/students to copy the essential Board Summary notes on the meaning, importance, roles, and classification of foods into their notebooks.

Pupils’ Activity: Pupils/students copy the notes carefully into their notebooks.

Learning Point: Board notes copied

Step 9: Conclusion

Time: 5 minutes

Teaching Skill: Reinforcement

Teacher’s Activity: The teacher summarises the key points of the lesson, re-emphasising the importance of understanding food and nutrition for healthy living. The teacher encourages students to apply this knowledge in their daily food choices.

Pupils’ Activity: Pupils listen and ask any final questions.

Learning Point: Key concepts reinforced

Continuous Assessment/Further Study

Type: Homework

Instruction: Answer the following questions in your notebook:

1. Explain the difference between food and nutrition in your own words.
2. List five different food items you ate yesterday and classify each by its main nutrient content and function in the body.
3. Describe two consequences of poor nutrition and suggest ways to prevent them.
4. Research and write a short paragraph on one career in Food and Nutrition that interests you, explaining what the job entails.

Lesson Keywords

• Food – Any edible substance consumed for energy, growth, and body maintenance.
• Nutrition – The process of obtaining and using food for growth, metabolism, and repair.
• Nutrients – Chemical substances in food essential for body function.
• Balanced Diet – A diet with all essential nutrients in correct proportions.
• Carbohydrates – Energy-giving foods like yam and rice.
• Proteins – Body-building foods like meat and beans.
• Fats and Oils – Energy-giving foods like palm oil and butter.
• Vitamins – Protective foods found in fruits and vegetables.
• Minerals – Protective foods like calcium and iron.
• Malnutrition – Poor nutrition, either under-nutrition or over-nutrition.

Differentiation

Support: Provide simplified charts with fewer food items for classification for struggling learners. Pair them with more capable students during group activities. Offer sentence starters for definitions.

Extension: Encourage advanced learners to research specific nutritional deficiencies common in Nigeria and their prevention. Ask them to design a simple balanced meal plan for a typical Nigerian family.

Suggested Lesson Videos

For further understanding of foods and nutrition, students can search on YouTube for:

• “Introduction to Food and Nutrition SS1”
• “Importance of Food and Nutrition for teenagers”
• “Food classification and functions”