You will learn
- Name digestive organs.
- Describe food’s journey.
- Explain absorption.
- Link to waste removal.
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
- Digestion breaks food down.
- The small intestine absorbs nutrients.
- The large intestine absorbs water.
- Waste leaves the body.
Words to know
breaking food into tiny parts the body can use
to take in
the long tube where nutrients enter the blood
the tube that takes in water and forms waste
1. Discover: The bread journey
Kwasi eats bread. Teeth chew it, saliva softens it, the oesophagus pushes it to the stomach, and the stomach churns it. In the small intestine the useful parts pass into his blood.
Think: What happens to the parts the body cannot use?
2. Understand: Digestion
Idea 1: The route
Food goes mouth, oesophagus, stomach, small intestine, large intestine and out. The liver and pancreas help by making digestive juices.
Idea 2: Break down
Teeth and the stomach break food physically. Saliva and stomach juices break it down chemically. This is digestion.
Idea 3: Absorb
In the small intestine, tiny finger-like villi absorb nutrients into the blood. The large intestine absorbs water. Waste leaves as faeces.
3. Worked examples
Example 1 (I show you): Order
Journey.
- Mouth.
- Stomach.
- Intestines.
Answer: Mouth, oesophagus, stomach, small intestine, large intestine.
Example 2 (We do it together): Match
Absorption.
- Small intestine.
- Nutrients.
- Blood.
Answer: Small intestine.
Example 3 (You try): Explain
Large intestine.
Show the steps and answer
- Water.
- Waste.
- Out.
Answer: It absorbs water and forms waste.
Did you know?
An adult small intestine is about 6 metres long, which gives food a long time and area for absorption.
Why this matters
Digestion gives us the energy and materials to grow.
4. Explore: Model digestion
Use a plastic bag, bread and water to model chewing and churning, then a stocking and a cloth to show absorption.
- Chew model with a bag.
- Add a little water.
- Squeeze to churn.
- Strain through cloth.
Think about it: what did you notice?
What did you notice? Squeezing broke the bread up; the cloth held back the solids.
5. Practise
Say it in a sentence
Use these starters when you talk about the lesson. Say them out loud.
- ___ breaks food into tiny parts.
- Nutrients are ___ in the small intestine.
- The ___ intestine takes in water.
- The ___ pushes food to the stomach.
Guided practice
Question 1. Where does food start?
Mouth.
Question 2. What does the stomach do?
Churns.
Question 3. Where is absorption?
Small intestine.
Independent practice
Level 1: Start
- Where does food start?
- What does the stomach do?
- Where is absorption?
- What does the large intestine do?
- How long is it?
Level 2: Grow
- Why chew?
- Why villi?
- Why liver?
Level 3: Stretch
- Run the model.
- Draw the route.
- Explain.
Answers are in the answer key below. Try first, then check.
6. Apply: Science in everyday life
Describe what happens to a slice of bread.
Show a sample answer
Use the route.
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: Small intestine.
Fix: Oesophagus.
8. Lesson summary and revision card
- I can name digestive organs.
- I can describe food’s journey.
- I can explain absorption.
- I can link to waste removal.
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
- Digestion breaks food down.
- The small intestine absorbs nutrients.
- The large intestine absorbs water.
- Waste leaves the body.
11. Next lesson
Next lesson: Respiratory system. 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.
- Order five parts. [3 marks]
- Explain absorption. [3 marks]
- Explain large intestine. [2 marks]
- Safety rule. [2 marks]
Total: 10 marks.
Marking guide and model answers
- Correct order [3]
- Small intestine [1]; nutrients [1]; blood [1]
- Water [1]; waste [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
- Where does food start?
- What does the stomach do?
- Where is absorption?
- What does the large intestine do?
- How long is it?
- Why chew?
- Why villi?
- Why liver?
- Run the model.
- Draw the route.
Homework
Draw the digestive route and label five organs.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| 1. Where does food start? | Mouth. | 1 |
| 2. What does the stomach do? | Churns. | 1 |
| 3. Where is absorption? | Small intestine. | 1 |
| 4. What does the large intestine do? | Takes water. | 1 |
| 5. How long is it? | 6 m. | 1 |
| 6. Why chew? | Smaller. | 1 |
| 7. Why villi? | Surface area. | 1 |
| 8. Why liver? | Help digestion. | 1 |
| 9. Run the model. | Steps. | 1 |
| 10. Draw the route. | Diagram. | 1 |
| Total | 10 |
Independent practice answers. Level 1: 1 Mouth.; 2 Churns.; 3 Small intestine.; 4 Takes water.; 5 6 m.. Level 2: 1 Smaller.; 2 Surface area.; 3 Help digestion.. Level 3: 1 Steps.; 2 Diagram.; 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 Name digestive organs | 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 Describe food’s journey | 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 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 Link to waste removal | 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 stomach absorbs most food.” Small intestine.
- Explain another way: use real objects, pictures or actions first, then words.
- Show a simpler example: Describe digestion.
- 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 digestion. You do not need to be an expert to help.
- Talk about meals.
- Ask “Where does food go?”
- Check allergies.
- 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 digestive organs; describe food’s journey; explain absorption; link to waste removal.
Prerequisite knowledge. Grade 4 ideas: the skeleton, muscles, teeth, digestion basics, the heart and healthy habits.
Materials. Bag, bread, cloth. 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 materials.
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). Chew a cracker slowly and ask, “What changed?”
Explanation (10 min). Teach the route.
Guided activity (10 min). Learners model.
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. Which organ? Which job?
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 stomach absorbs most food.” Small intestine.
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. Describe digestion. 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 5 Unit 2, topic 2; Next Generation Science Standards, structure and function in organisms; Cambridge Primary Science Stage 5, biology: humans and animals; IB Primary Years Programme, who we are. These sources informed the lesson.