• Class: Primary 4
  • Term: 2nd Term
  • Week: 4
  • Age: 9 years
  • Duration: 40 minutes
  • Subject: Basic Science Technology
  • Curriculum Theme: Basic Science
  • Topic: Human Body (The Mouth)
  • Content: Work of salivary gland and saliva.

Specific Objectives:

  • Cognitive Domain: Understand the functions of saliva and the salivary gland.
  • Affective Domain: Appreciate the importance of saliva in the digestive process.
  • Psychomotor Domain: Demonstrate ways to maintain oral hygiene.
  • Social Domain: Discuss the social aspects of saliva in food tasting and digestion.

Reference Materials:

  • 9 – Years Basic Education Curriculum
  • Abuja Educational Resource Centre Scheme of work
  • NAPPS National Unified Scheme of Work
  • Online Information
  • Textbooks

Instructional Materials:

  • Diagrams of the mouth and salivary glands
  • Video clips showing the process of saliva production
  • Real-life examples of foods that stimulate saliva production

Rationale for the Lesson:

Understanding the role of saliva and the salivary glands is crucial for comprehending the human digestive system and its importance in breaking down food and maintaining oral health.

Prerequisite/Previous Knowledge:

Basic knowledge of body parts, especially the mouth.


Content Development: Work Of Salivary Gland And Saliva

ContentTimeTeaching MethodTeaching StrategyTeacher’s ActivityPupil’s ActivityLearning Point
Introduction5 minLectureInteractive DiscussionIntroduce the topic and explain the objectivesListening and asking questionsUnderstanding the importance of the topic
Functions of Saliva10 minDemonstrationVisual LearningShow video/diagram of saliva productionObserving and identifying parts of the mouthIdentifying the role of saliva
Importance of Saliva in Digestion10 minGroup DiscussionCollaborative LearningFacilitate group discussions on saliva’s role in digestionDiscussing and sharing ideasUnderstanding saliva’s digestive functions
Oral Hygiene5 minPractical DemonstrationExperiential LearningDemonstrate proper oral hygiene practicesPracticing and mimicking the demonstrationLearning oral hygiene practices
Recap and Q&A5 minInteractive LectureInquiry-Based LearningRecap the lesson and answer questionsAsking and answering questionsReinforcing the lesson’s content
Note taking5 minWritingInformation RecallInstruct pupils to write notesWriting classroom notesSummarizing the lesson’s key points
Evaluation2 minQuestioningAssessmentAsk evaluation questionsResponding to questionsAssessing understanding of the topic
Conclusion3 minSummarizationClosureConclude the lesson and give a brief summaryListening and understandingGaining closure on the topic

Classroom Note:

Functions of Saliva in Feeding:

  • Saliva starts the process of digestion by breaking down starches into simpler sugars.
  • It lubricates the mouth, making swallowing easier.
  • Saliva helps in taste perception by dissolving food particles.
  • It contains enzymes that aid in the digestion of food.
  • Saliva acts as a cleanser for the mouth, washing away food particles and bacteria.
  • It helps in the formation of the food bolus for easier swallowing.
  • Saliva plays a role in oral health by neutralizing acids and aiding in tooth remineralization.

Importance of saliva in the digestive process:

  1. Starts Digestion: Saliva contains an enzyme called amylase which begins the process of breaking down starches into simpler sugars right in the mouth.
  2. Lubrication for Swallowing: It moistens food, making it easier to chew and swallow. Without saliva, swallowing dry or coarse food would be difficult.
  3. Taste Enhancement: Saliva helps in dissolving food particles, which enhances the ability to taste. It’s essential for appreciating the flavors of various foods.
  4. Oral Health: Saliva helps to cleanse the mouth by washing away food particles and bacteria, reducing the risk of tooth decay and gum disease. It also neutralizes acids that can erode tooth enamel.


  1. What is the primary enzyme found in saliva and what is its function?
  2. How does saliva contribute to oral hygiene?
  3. Describe how saliva assists in the digestion of food.

Note to Teachers:

Customize the lesson content, teaching methods, and pupil activities to suit your teaching style, curriculum, and available resources.

Categorized in:

Lesson Notes,

Last Update: January 29, 2024