Household Chemicals, Disinfectants, Antiseptics and Pesticides for Pre-School Level 2

Class: Pre-School Level 2

Term: Third Term

Week: 10

Age: 3 years

Duration: 30 minutes

Subject: Pre-Science

Curriculum Theme: Not separately stated in the scheme.

Previous Lesson: Not separately stated in the scheme.

Topic: HOUSEHOLD CHEMICALS: DISINFECTANTS, ANTISEPTICS AND PESTICIDES

Subject Matter: CHEMICALS USED AT HOME. Disinfectants, Antiseptics and Pesticides: for Killing Germs and Pest. Weekly focus: Household Chemicals: Disinfectants, Antiseptics and Pesticides.

Specific Objectives

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

Cognitive Domain

• Identify common disinfectants, antiseptics, and pesticides from pictures or empty containers.
• Name at least one use for a disinfectant, an antiseptic, and a pesticide.
• State a simple safety rule about household chemicals.

Affective Domain

• Show interest in learning about household chemicals.
• Listen attentively to instructions about chemical safety.

Psychomotor Domain

• Point to pictures or empty containers of disinfectants, antiseptics, and pesticides when named.
• Demonstrate (through actions) a safe way to interact with household chemicals (e.g., “tell an adult”).

Social Domain

• Participate in group discussions about household chemicals.
• Take turns identifying different items.

Reference Materials

• NAPPS National Unified Teaching Scheme for Pre-School Level 2
• Relevant Early Childhood Care and Education resources

Instructional Materials

• Empty, clearly labelled containers of common disinfectants (e.g., Dettol, Izal, Harpic)
• Empty, clearly labelled containers of common antiseptics (e.g., Dettol, Savlon, Spirit)
• Empty, clearly labelled containers of common pesticides (e.g., Raid, Mortein)
• Charts and posters showing pictures of these chemicals and their uses
• Pictures of germs and pests (e.g., mosquitoes, flies, cockroaches)

Rationale for the Lesson

This lesson is crucial for 3-year-olds to begin understanding the common household items around them that are used for cleaning and hygiene. It introduces them to the concept that some items are helpful but must be used safely by adults, fostering early awareness of cleanliness, health, and potential dangers in their environment.

Prerequisite/Previous Knowledge

Pupils can identify common household items and understand simple instructions about keeping clean and healthy. They may have seen adults using cleaning products at home.

Lesson Content/Board Summary

HOUSEHOLD CHEMICALS: DISINFECTANTS, ANTISEPTICS AND PESTICIDES

Household chemicals are special liquids or sprays we use at home to keep things clean, kill tiny germs, or get rid of insects.

Disinfectants

• What they are: Special liquids that kill germs on surfaces like floors, tables, and toilets.
• Examples: Dettol (for floors), Izal (for cleaning), Harpic (for toilets).
• Uses: Making our homes clean and free from sickness-causing germs.

Antiseptics

• What they are: Special liquids that kill germs on our skin, especially when we have a small cut or scrape.
• Examples: Dettol (for skin), Savlon (for wounds), Surgical Spirit.
• Uses: Cleaning small cuts to stop germs from entering and making us sick.

Pesticides

• What they are: Sprays or powders that kill tiny insects or pests like mosquitoes, flies, and cockroaches.
• Examples: Raid, Mortein (insect sprays).
• Uses: Getting rid of pests that can bite us or spread sickness.

Important Safety Rule!

These chemicals are NOT for playing! They are for adults only. If you see them, tell an adult and do not touch or taste them. Keep them far away from your mouth and eyes.

Clean and Safe Rhyme

Tune: “Twinkle, Twinkle Little Star”

Clean, clean, keep our home so neat,
Germs and pests, we must defeat.
Dettol, Izal, strong and bright,
Keep our surfaces clean and right.
Antiseptic for a little cut,
Pesticide for bugs, but shut,
Away from children, safely high,
Adults use them, bye bye bye!

Actions:

• “Clean, clean”: Rub hands together.
• “Germs and pests”: Make a ‘shoo’ motion.
• “Dettol, Izal”: Point to disinfectant containers.
• “Keep our surfaces”: Pat hands on an imaginary table.
• “Antiseptic”: Point to a small cut on arm.
• “Pesticide for bugs”: Make a spraying motion.
• “Away from children, safely high”: Raise hands up high.
• “Adults use them”: Point to an imaginary adult.

Key Words

• Disinfectant – a liquid that kills germs on surfaces.
• Antiseptic – a liquid that kills germs on skin.
• Pesticide – a spray or powder that kills insects or pests.
• Germs – tiny things that can make us sick.
• Pests – unwanted insects like mosquitoes or cockroaches.

Teaching Methods/Instructional Techniques

Play-based Learning, Demonstration, Guided Practice, Songs and Rhymes, Picture Talk, Question and Answer, Manipulation of Objects, Repetition, Practical Activity.

Instructional Procedures

Step 1: Introduction

Time: 3 minutes

Teaching Skill: Engagement/Recall

Teacher’s Activity: Greets pupils and sings a short “keeping clean” song. Asks pupils what they do to keep their bodies and homes clean.

Pupils’ Activity: Respond to greetings, sing along, and share simple ideas about cleanliness.

Learning Point: Pupils are engaged and recall prior knowledge about cleanliness.

Step 2: Introducing Disinfectants

Time: 5 minutes

Teaching Skill: Identification/Demonstration

Teacher’s Activity: Shows empty containers/pictures of common disinfectants (e.g., Dettol, Izal, Harpic). Asks pupils if they have seen these at home. Explains that these are called disinfectants and they kill germs on floors and toilets.

Pupils’ Activity: Look at the containers/pictures, point to them, and say “yes” if they have seen them. Listen to the teacher’s explanation.

Learning Point: Pupils identify disinfectants and know their general purpose.

Step 3: Discussing Antiseptics

Time: 4 minutes

Teaching Skill: Explanation/Safety

Teacher’s Activity: Shows empty containers/pictures of common antiseptics (e.g., Dettol, Savlon). Explains that these are antiseptics and they help clean small cuts on our skin to stop germs. Emphasizes that an adult must always apply them.

Pupils’ Activity: Observe the antiseptics. Listen to the explanation and repeat the safety rule about adults using them.

Learning Point: Pupils identify antiseptics and understand their use for skin, with adult supervision.

Step 4: Introducing Pesticides

Time: 4 minutes

Teaching Skill: Identification/Concept Building

Teacher’s Activity: Shows empty containers/pictures of common pesticides (e.g., Raid, Mortein). Explains that these are pesticides and they are used to kill pests like mosquitoes and cockroaches. Shows pictures of common pests.

Pupils’ Activity: Look at the pesticides and pest pictures. Listen to the explanation about killing pests.

Learning Point: Pupils identify pesticides and understand their role in controlling pests.

Step 5: Reinforcing Safety

Time: 4 minutes

Teaching Skill: Reinforcement/Discussion

Teacher’s Activity: Holds up all the empty containers/pictures again. Asks pupils, “Are these for playing?” and “Who should use them?” Reinforces the rule: “Do not touch, tell an adult!”

Pupils’ Activity: Respond “No!” to playing, “Adults!” to who should use them. Repeat the safety rule.

Learning Point: Pupils understand that household chemicals are dangerous and only for adult use.

Step 6: Rhyme and Movement

Time: 4 minutes

Teaching Skill: Rhyme/Motor Skills

Teacher’s Activity: Leads pupils in singing the “Clean and Safe Rhyme” with actions. Repeats the rhyme several times to encourage memorization and participation.

Pupils’ Activity: Sing the rhyme along with the teacher, performing the actions.

Learning Point: Pupils reinforce learning through song and actions, improving recall and coordination.

Step 7: Evaluation/Review

Time: 4–5 minutes

Teaching Skill: Questioning/Assessment

Teacher’s Activity: The teacher checks pupils’ understanding through short questions and practical tasks.

1. “Point to the disinfectant.” (Teacher shows pictures/containers).
2. “What do we use antiseptic for?”
3. “What kills mosquitoes?”
4. “Is it safe to play with these chemicals?” (Teacher points to a chemical).

Pupils’ Activity: Pupils respond orally and demonstrate the required skill where appropriate (e.g., pointing, saying “for cuts,” “pesticide,” “No!”).

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 2 minutes

Teaching Skill: Summarization/Closure

Teacher’s Activity: Quickly recaps that some things at home help us stay clean and safe from germs and pests, but only adults should handle them. Praises pupils for their participation and good listening. Encourages them to tell their parents what they learned about safety.

Pupils’ Activity: Listen to the recap, say “thank you,” and promise to be safe at home.

Learning Point: Pupils consolidate their learning and understand the importance of safety at home.

Lesson Keywords

• Disinfectant – a liquid that kills germs on floors and surfaces.
• Antiseptic – a liquid that kills germs on our skin, like on a small cut.
• Pesticide – a spray that kills insects like mosquitoes or cockroaches.
• Germs – tiny things that can make us sick.
• Pests – unwanted insects that can bite us or spread sickness.
• Safety – keeping ourselves from harm or danger.

Differentiation

• Support: For pupils who are struggling, use larger, very distinct pictures. Repeat the names and uses slowly and clearly. Guide their hands to point to the correct items. Provide one-on-one prompts for the safety rule.
• Extension: For pupils who grasp the concepts quickly, ask them to identify another place where disinfectants might be used (e.g., school toilet). Ask them to name another type of pest. Encourage them to explain *why* it’s important for adults to handle these chemicals.