You will learn
- Name the two intestines.
- Say what each does.
- Describe nutrient absorption.
- Explain why fibre helps.
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
- Food moves from the stomach to the small intestine.
- Nutrients pass into the blood there.
- The large intestine takes in water.
- Fibre helps keep food moving.
Words to know
the long tube where nutrients enter the blood
the wider tube that takes in water
something in food the body needs
plant material that helps food move
1. Discover: The long string
Adjoa measures a long piece of string across the classroom floor. “That is how long your small intestine would be if you stretched it out,” says the teacher. “About six metres!” The class gasps.
Think: Why might it need to be so long?
2. Understand: Intestines
Idea 1: Small intestine
The small intestine is a long, narrow tube. Food is broken down further and nutrients pass through its walls into the blood.
Idea 2: Large intestine
The large intestine is wider but shorter. It takes in water and forms the leftover waste.
Idea 3: Fibre
Fibre from fruit, vegetables and whole grains helps food move through the intestines.
3. Worked examples
Example 1 (I show you): Name
Long narrow tube.
- Small.
- Intestine.
- Nutrients.
Answer: The small intestine absorbs nutrients.
Example 2 (We do it together): Job
Large intestine?
- Wide tube.
- Takes in water.
- Waste forms.
Answer: The large intestine takes in water.
Example 3 (You try): Help
What helps movement?
Show the steps and answer
- Fibre.
- Plants.
- Fruit.
Answer: Fibre helps food move.
Did you know?
The small intestine is lined with tiny finger-shaped bumps called villi that give it a huge surface for absorbing nutrients.
Why this matters
The intestines move nutrients into the blood so every part of the body gets energy.
4. Explore: String length
Measure a six-metre string and fold it into a body outline.
- Measure six metres of string.
- Lay it out.
- Fold it into a body outline.
- Discuss why it is folded.
Think about it: what did you notice?
What did you notice? A long tube can fit when it is coiled.
5. Practise
Say it in a sentence
Use these starters when you talk about the lesson. Say them out loud.
- The ___ intestine absorbs nutrients.
- The ___ intestine takes in water.
- ___ helps food move.
- Nutrients pass into the ___.
Guided practice
Question 1. Name the two intestines.
Small and large.
Question 2. What does the small intestine do?
Absorbs nutrients.
Question 3. What does the large intestine do?
Takes in water.
Independent practice
Level 1: Start
- Name the two intestines.
- What does the small intestine do?
- What does the large intestine do?
- What is fibre?
- Where do nutrients go?
Level 2: Grow
- Why is it long?
- Why eat fibre?
- Why coiled?
Level 3: Stretch
- Lay out the string.
- Draw the intestines.
- Explain nutrient absorption.
Answers are in the answer key below. Try first, then check.
6. Apply: Science in everyday life
Name a fibre food.
Show a sample answer
Beans.
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: The small one is longer.
Fix: It travels through intestines.
8. Lesson summary and revision card
- I can name the two intestines.
- I can say what each does.
- I can describe nutrient absorption.
- I can explain why fibre helps.
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
- Food moves from the stomach to the small intestine.
- Nutrients pass into the blood there.
- The large intestine takes in water.
- Fibre helps keep food moving.
11. Next lesson
Next lesson: Digestion introduction. 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.
- Name the two intestines. [2 marks]
- State the job of each. [4 marks]
- Why is fibre helpful? [2 marks]
- Why is the small intestine long? [1 mark]
- Safety rule? [1 mark]
Total: 10 marks.
Marking guide and model answers
- Small [1]; large [1]
- Small absorbs nutrients [2]; large takes in water [2]
- Helps food move [1]; plant foods [1]
- More absorption [1]
- Any [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
- Name the two intestines.
- What does the small intestine do?
- What does the large intestine do?
- What is fibre?
- Where do nutrients go?
- Why is it long?
- Why eat fibre?
- Why coiled?
- Lay out the string.
- Draw the intestines.
Homework
Measure a six-metre string at home and fold it to fit in a box.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| 1. Name the two intestines. | Small and large. | 1 |
| 2. What does the small intestine do? | Absorbs nutrients. | 1 |
| 3. What does the large intestine do? | Takes in water. | 1 |
| 4. What is fibre? | Plant material. | 1 |
| 5. Where do nutrients go? | Blood. | 1 |
| 6. Why is it long? | More absorption. | 1 |
| 7. Why eat fibre? | Helps food move. | 1 |
| 8. Why coiled? | To fit. | 1 |
| 9. Lay out the string. | Observation. | 1 |
| 10. Draw the intestines. | Diagram. | 1 |
| Total | 10 |
Independent practice answers. Level 1: 1 Small and large.; 2 Absorbs nutrients.; 3 Takes in water.; 4 Plant material.; 5 Blood.. Level 2: 1 More absorption.; 2 Helps food move.; 3 To fit.. Level 3: 1 Observation.; 2 Diagram.; 3 Paragraph..
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 Name the two intestines | 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 Say what each does | 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 Describe nutrient absorption | 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 Explain why fibre helps | 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: “The large intestine is longer.” The small one is longer.
- Explain another way: use real objects, pictures or actions first, then words.
- Show a simpler example: Explain what each intestine does.
- 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 the intestines. You do not need to be an expert to help.
- Measure six metres together.
- Ask, “How can this fit inside?”
- Eat fibre foods.
- 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: name the two intestines; say what each does; describe nutrient absorption; explain why fibre helps.
Prerequisite knowledge. Grade 2 body ideas: the five senses, parts of the body, healthy food, exercise and washing hands.
Materials. String, tape measure, box. 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. Cut six-metre strings.
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 the long string and ask, “How can this fit inside us?”
Explanation (10 min). Teach intestines.
Guided activity (10 min). Learners fold strings.
Independent activity (10 min). Learners explain.
Assessment and reflection (5 min). Ask each learner to say one thing they learned and how they know it.
Key questions. What does each intestine do?
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. “The large intestine is longer.” The small one is longer.
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 what each intestine does. 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 3 Unit 4, topic 6; Next Generation Science Standards, structure and function in living things; Cambridge Primary Science Stage 3, plants and humans; IB Primary Years Programme, who we are and how the world works. These sources informed the lesson.