You will learn
- Describe rough and smooth.
- Sort materials by texture.
- Say why a rough or smooth surface is useful.
- Use touch safely.
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
- Rough surfaces feel bumpy.
- Smooth surfaces feel even.
- Texture is how something feels.
- Rough surfaces can stop us slipping; smooth surfaces slide easily.
Words to know
bumpy, not smooth
even, with no bumps
how a surface feels
paper with rough grains used to smooth wood
1. Discover: The path and the slide
Hana walks on a rough path. Her shoes do not slip. Then she climbs the slide, which is smooth. She slides down quickly. “The slide is smooth and the path is rough,” she says.
Think: Why is a slide smooth?
2. Understand: Rough and smooth
Idea 1: Rough materials
A rough surface is bumpy. Sandpaper, tree bark and a brick wall are rough. Rough surfaces grip, so our shoes do not slip.
Idea 2: Smooth materials
A smooth surface is even. Glass, polished stone and a slide are smooth. Smooth surfaces let things slide easily.
Idea 3: Texture
The way a surface feels is its texture. We feel texture with our fingers. We can make a rough wooden board smooth by rubbing it with sandpaper.
3. Worked examples
Example 1 (I show you): Rough or smooth?
Sandpaper.
- Rub your finger.
- It feels bumpy.
- So it is rough.
Answer: Sandpaper is rough.
Example 2 (We do it together): Why a rough path?
A wet path.
- Smooth would be slippery.
- Rough grips shoes.
- So paths are often rough.
Answer: Rough paths stop us slipping.
Example 3 (You try): Why a smooth slide?
A playground.
Show the steps and answer
- We want to slide.
- Smooth lets us slide.
- Rough would stop us.
Answer: A smooth slide lets us slide fast.
Did you know?
The skin of a shark feels rough like sandpaper, yet it helps the shark swim smoothly.
Why this matters
Choosing rough or smooth surfaces helps us make things safe and useful.
4. Explore: Texture rubbing
Make rubbings of rough and smooth surfaces.
- Place paper on a rough surface.
- Rub with a crayon.
- Do the same for a smooth surface.
- Compare the rubbings.
Think about it: what did you notice?
What did you notice? Rough surfaces make a pattern.
5. Practise
Say it in a sentence
Use these starters when you talk about the lesson. Say them out loud.
- Sandpaper is ___.
- Glass is ___.
- Texture is how a surface ___.
- A slide is ___.
Guided practice
Question 1. Is sandpaper rough or smooth?
Rough.
Question 2. Is glass rough or smooth?
Smooth.
Question 3. What is texture?
How a surface feels.
Independent practice
Level 1: Start
- Is sandpaper rough or smooth?
- Is glass rough or smooth?
- What is texture?
- Is a slide smooth or rough?
- What do we feel texture with?
Level 2: Grow
- Why are paths rough?
- Why is a slide smooth?
- Name two rough things.
Level 3: Stretch
- Sort objects by texture.
- Explain why we sand wood.
- Compare a brick and a window.
Answers are in the answer key below. Try first, then check.
6. Apply: Science in everyday life
What rough and smooth things are around you?
Show a sample answer
Walls, tree bark, glass, tiles.
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: Textures differ.
Fix: Rough surfaces stop slipping.
8. Lesson summary and revision card
- I can describe rough and smooth.
- I can sort materials by texture.
- I can say why a rough or smooth surface is useful.
- I can use touch safely.
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
- Rough surfaces feel bumpy.
- Smooth surfaces feel even.
- Texture is how something feels.
- Rough surfaces can stop us slipping; smooth surfaces slide easily.
11. Next lesson
Next lesson: Choosing materials for different purposes. 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.
- What is texture? [1 mark]
- Name two rough things. [2 marks]
- Name two smooth things. [2 marks]
- Why is a slide smooth? [2 marks]
- Why are paths rough? [2 marks]
Total: 9 marks.
Marking guide and model answers
- How a surface feels [1]
- Any two [1 each]
- Any two [1 each]
- To slide [1]; less grip [1]
- To grip [1]; stop slipping [1]
Score guide: 8 to 9 = secure. 6 to 7 = nearly there, revise the parts you missed. Under 6 = work through the lesson again with a grown-up.
Printable worksheet
- Is sandpaper rough or smooth?
- Is glass rough or smooth?
- What is texture?
- Is a slide smooth or rough?
- What do we feel texture with?
- Why are paths rough?
- Why is a slide smooth?
- Name two rough things.
- Sort objects by texture.
- Explain why we sand wood.
Homework
Find five rough and five smooth things at home. Make rubbings of two.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| 1. Is sandpaper rough or smooth? | Rough. | 1 |
| 2. Is glass rough or smooth? | Smooth. | 1 |
| 3. What is texture? | How a surface feels. | 1 |
| 4. Is a slide smooth or rough? | Smooth. | 1 |
| 5. What do we feel texture with? | Fingers. | 1 |
| 6. Why are paths rough? | To stop slipping. | 1 |
| 7. Why is a slide smooth? | To slide. | 1 |
| 8. Name two rough things. | Bark and sandpaper. | 1 |
| 9. Sort objects by texture. | Rough and smooth groups. | 1 |
| 10. Explain why we sand wood. | To make it smooth. | 1 |
| Total | 10 |
Independent practice answers. Level 1: 1 Rough.; 2 Smooth.; 3 How a surface feels.; 4 Smooth.; 5 Fingers.. Level 2: 1 To stop slipping.; 2 To slide.; 3 Bark and sandpaper.. Level 3: 1 Rough and smooth groups.; 2 To make it smooth.; 3 Brick: rough. Window: smooth..
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 Describe rough and smooth | 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 Sort materials by texture | 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 Say why a rough or smooth surface is useful | 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 Use touch safely | 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: “All surfaces feel the same.” Textures differ.
- Explain another way: use real objects, pictures or actions first, then words.
- Show a simpler example: Use six items. Sort rough and smooth.
- 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 learns about rough and smooth textures and why each is useful. You do not need to be an expert to help.
- Feel surfaces at home.
- Ask, “Why is the floor rough?”
- Make a rubbing together.
- 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: describe rough and smooth; sort materials by texture; say why a rough or smooth surface is useful; use touch safely.
Prerequisite knowledge. None. Learners should be able to look, listen and talk about what they notice.
Materials. Sandpaper, tiles, bark, glass (plastic pretend), paper and crayons. 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. Gather safe items. Remove any sharp ones. Set out paper and crayons.
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). Ask, “How does a slide feel? How does the path feel?”
Explanation (10 min). Teach rough and smooth.
Guided activity (10 min). Learners do rubbings.
Independent activity (10 min). Learners sort by texture.
Assessment and reflection (5 min). Ask each learner to say one thing they learned and how they know it.
Key questions. Is it rough or smooth? Why is that useful?
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. “All surfaces feel the same.” Textures differ.
13–15. Assessment questions, answer keys, marking scheme
Use the quiz, the 9-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. Use six items. Sort rough and smooth. 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 1 Unit 6, topic 9; Next Generation Science Standards, structure and properties of matter; Cambridge Primary Science Stage 1, materials; IB Primary Years Programme, how the world works. These sources informed the lesson.