You will learn
- Define insulator.
- List insulators.
- Explain their uses.
- Compare with conductors.
Version 0.2 · expanded edition · built from cited public sources Content is based on the official frameworks and sources listed under Sources and standards. No official endorsement is claimed. Written in the style of common primary school assessments. No exam result is promised.
Student lesson
- Insulators stop current.
- Plastic and rubber cover wires.
- Air is an insulator.
- Insulators protect people.
Words to know
a material that does not let current flow
covering conductors to protect users
a stretchy, insulating material
another word for an insulating material
1. Discover: The electrician’s gloves
An electrician wears thick rubber gloves and uses tools with plastic handles. “Rubber and plastic are insulators,” says Mr Owusu. “They stop electricity passing through to the person.”
Think: Why are wires covered in plastic?
2. Understand: Insulators
Idea 1: Insulators
An insulator does not let current flow. Rubber, plastic, glass, wood, dry cloth and air are insulators. In them electrons are held tightly to their atoms.
Idea 2: Uses
Wires are covered with plastic or rubber, plugs have plastic cases, and pylons use glass or ceramic insulators to hold cables.
Idea 3: Limits
No insulator is perfect. At very high voltages even air or dry wood can conduct, as in lightning. Wet materials conduct better, so water and electricity do not mix.
3. Worked examples
Example 1 (I show you): List
Insulators.
- Rubber.
- Plastic.
- Glass.
Answer: Three.
Example 2 (We do it together): Explain
Wire cover.
- Protect.
- Stop shock.
- Keep apart.
Answer: Safety.
Example 3 (You try): Design
Handle.
Show the steps and answer
- Plastic.
- Grip.
- Safe.
Answer: Insulated handle.
Did you know?
Lightning is air breaking down as an insulator when voltage becomes huge.
Why this matters
Insulation keeps electricity where it should be.
4. Explore: Insulating handle
Design a handle for a low-voltage screwdriver model using plastic, wood and foil and test with the circuit tester which materials stop the current.
- Test materials.
- Choose insulators.
- Build a model.
- Test safety.
Think about it: what did you notice?
What did you notice? Plastic and wood stopped the bulb lighting.
5. Practise
Say it in a sentence
Use these starters when you talk about the lesson. Say them out loud.
- An ___ does not let current flow.
- Electrical ___ covers conductors.
- ___ is stretchy and insulating.
- Wet materials ___ better.
Guided practice
Question 1. What is an insulator?
Stops current.
Question 2. Name one.
Rubber.
Question 3. Why cover wires?
Safety.
Independent practice
Level 1: Start
- What is an insulator?
- Name one.
- Why cover wires?
- Is air an insulator?
- Are wet items safe?
Level 2: Grow
- Why plastic?
- Why gloves?
- Why wet unsafe?
Level 3: Stretch
- Test items.
- Design handle.
- Explain.
Answers are in the answer key below. Try first, then check.
6. Apply: Science in everyday life
Explain why electrical plugs have plastic cases.
Show a sample answer
Use insulators.
Another one. Tell a family member one thing from this lesson. Use the words you learned.
Show a sample answer
A clear sentence that uses at least one word from Words to know.
7. Common mistakes
Fix: High voltage can break through.
Fix: Impure water conducts.
8. Lesson summary and revision card
- I can define insulator.
- I can list insulators.
- I can explain their uses.
- I can compare with conductors.
9. Check and master
Answer all 14 questions. You will see feedback after each one.
Your result appears here after you answer every question.
10. Key takeaways
- Insulators stop current.
- Plastic and rubber cover wires.
- Air is an insulator.
- Insulators protect people.
11. Next lesson
Next lesson: Magnets. Keep going with the next idea in this course.
Exam practice
These questions are written in the style of common school and international primary assessments. Try them on your own, without looking back. Then check your answers in the marking guide. The marks are shown in brackets.
- Define insulator and conductor. [2 marks]
- List three insulators and a use. [3 marks]
- Explain why water and electricity do not mix. [3 marks]
- Safety rule. [2 marks]
Total: 10 marks.
Marking guide and model answers
- 1 each
- Three [2]; use [1]
- Wet conducts [1]; shock risk [1]; keep apart [1]
- Any [1]; reason [1]
Score guide: 9 to 10 = secure. 6 to 8 = nearly there, revise the parts you missed. Under 6 = work through the lesson again with a grown-up.
Printable worksheet
- What is an insulator?
- Name one.
- Why cover wires?
- Is air an insulator?
- Are wet items safe?
- Why plastic?
- Why gloves?
- Why wet unsafe?
- Test items.
- Design handle.
Homework
Find five insulators at home.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| 1. What is an insulator? | Stops current. | 1 |
| 2. Name one. | Rubber. | 1 |
| 3. Why cover wires? | Safety. | 1 |
| 4. Is air an insulator? | Yes. | 1 |
| 5. Are wet items safe? | No. | 1 |
| 6. Why plastic? | Insulates. | 1 |
| 7. Why gloves? | Protect. | 1 |
| 8. Why wet unsafe? | Conducts. | 1 |
| 9. Test items. | Table. | 1 |
| 10. Design handle. | Sketch. | 1 |
| Total | 10 |
Independent practice answers. Level 1: 1 Stops current.; 2 Rubber.; 3 Safety.; 4 Yes.; 5 No.. Level 2: 1 Insulates.; 2 Protect.; 3 Conducts.. Level 3: 1 Table.; 2 Sketch.; 3 Sentence..
Quiz answers: 1 B, 2 C, 3 A, 4 B, 5 C, 6 A, 7 B, 8 C, 9 A, 10 B, 11 C, 12 A, Challenge 1 B, Challenge 2 C.
Mastery and remediation
| Objective | Bronze (Developing) | Silver (Proficient) | Gold (Advanced) |
|---|---|---|---|
| O1 Define insulator | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O2 List insulators | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O3 Explain their uses | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O4 Compare with conductors | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
Courseversity badge thresholds (overall quiz score): Gold = 90–100%; Silver = 80–89.9%; Bronze = 70–79.9%. A badge is never a full record of progress.
If a learner struggles
- Find the misconception: “Insulators are perfect.” High voltage can break through.
- Explain another way: use real objects, pictures or actions first, then words.
- Show a simpler example: Explain insulators.
- Guided practice: work through one example together and let the learner try the next one.
- Reassess: use the quiz again or the worksheet.
- Move on when the learner shows Silver-level evidence independently.
For parents and guardians
In this lesson your child studies insulators with safe cells. You do not need to be an expert to help.
- Look at cables.
- Ask “Why plastic?”
- Keep plugs dry.
- Ask “how do you know?” after each answer, and listen.
- Praise effort, not only right answers. Mistakes are how we learn.
- Ten to fifteen minutes a day is better than one long session.
Teacher package
1–5. Objectives, prerequisites, materials, preparation, duration
Lesson objectives. Learners will: define insulator; list insulators; explain their uses; compare with conductors.
Prerequisite knowledge. Grade 5 ideas: simple circuits, conductors and insulators, and magnets.
Materials. Cells, bulbs, test items. Low-resource options: use chalk or charcoal on a board or wall, drawings in the sand, and objects from the classroom instead of printed materials.
Preparation. Set out items.
Suggested duration. 45–60 minutes. It can be split into two shorter sessions.
6–9. Teaching procedure, explanation notes, guided and independent activities
Introduction (5 min). Show a cable and ask, “Why plastic outside, metal inside?”
Explanation (10 min). Teach insulators.
Guided activity (10 min). Learners test.
Independent activity (10 min). Learners design.
Assessment and reflection (5 min). Ask each learner to say one thing they learned and how they know it.
Key questions. Did it stop current? Why use it?
Teacher explanation notes. Start with real objects and safe, hands-on observation. Then talk about what was seen, then draw and write. Always say “how do you know?”. Keep to the safety notes, and use local, safe materials.
10–12. Differentiation, formative assessment, common misconceptions
Support. Use real objects and pictures, short sentences and a partner. Let learners point, show or draw instead of writing. Extension. Ask learners to find a new example at home and explain how they know.
Formative assessment. Listen to learners read and explain, ask “how do you know?”, and check the independent work.
Misconceptions. “Insulators are perfect.” High voltage can break through.
13–15. Assessment questions, answer keys, marking scheme
Use the quiz, the 10-mark exam practice and the worksheet on this page. All answers and marking guides are in the answer sections above. Re-check every answer before use.
16–19. Remediation, enrichment, homework, teacher reflection
Remediation. Explain insulators. Enrichment. Look for one new example near your home or school, draw it and explain it to someone. Homework. See above.
Teacher reflection. After teaching, record: which ideas learners understood; which misconceptions occurred; which activities worked; which learners need more practice; and what to improve next time.
Sources and standards
This lesson is based on the sources below, and no official endorsement is claimed. Reference starting points: Next Generation Science Standards, Cambridge Primary Science and the IB Primary Years Programme. Where a standard code is named, it points to the official framework.
Research used to shape this lesson. Courseversity Science curriculum, Grade 6 Unit 7, topic 7; Next Generation Science Standards, energy and forces; Cambridge Lower Secondary Science, physics; IB Primary Years Programme, how the world works. These sources informed the lesson.