Digestion: Our Food's Journey

Students learn best when they can see, touch and move. This topic is perfect for active learning because digestion is a process that happens inside our bodies but can be modelled with simple materials and actions. When children act out each step or build a tube system, they connect abstract ideas to their own experiences and daily habits like eating rice or roti.

• Class 2
• Science (EVS K-5)
• 4 activities
• 20 min–40 min

Learning Objectives

1. Identify the sequence of organs food passes through during digestion, starting from the mouth.
2. Explain the function of at least two digestive organs (e.g., stomach, small intestine) in breaking down food.
3. Compare the role of chewing and stomach churning in food breakdown.
4. Predict the consequence of a specific part of the digestive system failing to function.

Role Play

⏱ 30 min·Small Groups

Role Play: Food's Journey Through Body

Assign roles: one student as food particle, others as mouth, oesophagus, stomach, intestines. Food moves station to station while parts describe actions like chewing or mixing. Groups perform and explain to class.

Prepare & details

Explain what happens to the food we eat after it leaves our mouth.

Facilitation Tip: During the Role Play, give each student a small sign showing their assigned body part and ask them to move in sequence as you narrate the journey.

Setup: Adaptable to standard classroom seating with fixed benches; fishbowl arrangements work well for Classes of 35 or more; open floor space is useful but not required

Materials: Printed character cards with role background, objectives, and knowledge constraints, Scenario brief sheet (one per student or one per group), Structured observation sheet for students watching a fishbowl format, Debrief discussion prompt cards, Assessment rubric aligned to NEP 2020 competency domains

• Apply
• Analyze
• Evaluate
• Social Awareness
• Self-Awareness

Role Play

⏱ 40 min·Pairs

Model Building: Simple Digestion Tube

Use a long tube, balloons for stomach, food scraps, and water. Pour food in, squeeze through tube sections to show path. Observe changes and discuss nutrient absorption.

Prepare & details

Predict what would happen if one part of our digestive system stopped working.

Facilitation Tip: While building the Model Digestion Tube, remind students to use clear plastic pipes so they can see the food’s path and add labels from their vocabulary chart.

Setup: Adaptable to standard classroom seating with fixed benches; fishbowl arrangements work well for Classes of 35 or more; open floor space is useful but not required

Materials: Printed character cards with role background, objectives, and knowledge constraints, Scenario brief sheet (one per student or one per group), Structured observation sheet for students watching a fishbowl format, Debrief discussion prompt cards, Assessment rubric aligned to NEP 2020 competency domains

• Apply
• Analyze
• Evaluate
• Social Awareness
• Self-Awareness

Role Play

⏱ 20 min·Individual

Chewing Experiment: Bread Breakdown

Give dry bread pieces; students chew one bite well, swallow pretend, compare to unchewed. Note easier mixing with saliva. Record feelings and share why thorough chewing helps.

Prepare & details

Justify the importance of chewing food thoroughly before swallowing.

Facilitation Tip: For the Chewing Experiment, provide plain bread slices and ask students to chew one slice ten times and another slice five times, then compare the lumps.

Setup: Adaptable to standard classroom seating with fixed benches; fishbowl arrangements work well for Classes of 35 or more; open floor space is useful but not required

Materials: Printed character cards with role background, objectives, and knowledge constraints, Scenario brief sheet (one per student or one per group), Structured observation sheet for students watching a fishbowl format, Debrief discussion prompt cards, Assessment rubric aligned to NEP 2020 competency domains

• Apply
• Analyze
• Evaluate
• Social Awareness
• Self-Awareness

Role Play

⏱ 35 min·Small Groups

Group Chart: Digestion Path

In groups, draw body outline, label organs with food journey arrows. Add what each does, using colours for energy parts. Present to class with predictions if one stops.

Prepare & details

Explain what happens to the food we eat after it leaves our mouth.

Facilitation Tip: When creating the Group Chart, provide a large poster paper with a simple outline of a human body and ask groups to place cut-out labels for each organ in the correct spot.

Setup: Adaptable to standard classroom seating with fixed benches; fishbowl arrangements work well for Classes of 35 or more; open floor space is useful but not required

Materials: Printed character cards with role background, objectives, and knowledge constraints, Scenario brief sheet (one per student or one per group), Structured observation sheet for students watching a fishbowl format, Debrief discussion prompt cards, Assessment rubric aligned to NEP 2020 competency domains

• Apply
• Analyze
• Evaluate
• Social Awareness
• Self-Awareness

Teaching This Topic

Teachers should avoid telling the whole story at once. Instead, let students discover the process through guided actions and models. Research shows that children aged 6 to 8 learn body processes better when they use their own bodies or hands-on materials rather than reading or listening alone. Always connect the science to daily life, such as asking students to think about how they feel after eating too much or too little.

What to Expect

By the end of these activities, students should be able to name and locate the mouth, oesophagus, stomach, small intestine, and large intestine. They should explain that food breaks down gradually through chewing, churning, and absorption, and finally leaves the body as waste. Their language should include terms like saliva, juices, nutrients, and waste.

Watch Out for These Misconceptions

Common Misconception

During the Role Play activity, watch for students who say food disappears in the stomach.

What to Teach Instead

Use the role play to stop at the stomach and have students mime churning while you narrate, 'Food does not vanish. It breaks into small parts here.' Then ask them to continue the role play to the intestines and finally to the toilet to show waste exit.

Common Misconception

During the Chewing Experiment activity, watch for students who think chewing is not important.

What to Teach Instead

After students chew bread slices five and ten times, ask them to describe which lump is easier to swallow and why. Guide them to notice that saliva mixes with food to make small, soft lumps for safe swallowing and quick breakdown.

Common Misconception

During the Model Building activity, watch for students who only label the mouth and stomach.

What to Teach Instead

Provide a checklist of all organs and require students to place and label each part in sequence before testing their model. Ask them to trace the path with a finger as they explain what happens in each organ to reinforce the full journey.

Assessment Ideas

Exit Ticket

After the Role Play activity, give each student a drawing of the digestive system with blank labels. Ask them to label the mouth, oesophagus, stomach, and small intestine. Then, ask them to write one sentence about what happens to food in the stomach.

Discussion Prompt

During the Model Building activity, pose this scenario: 'Imagine your oesophagus stopped working. What do you think would happen to the food in your mouth?' Facilitate a class discussion, encouraging students to use vocabulary like swallowing, tube, and choking.

Quick Check

After the Group Chart activity, ask students to show with their hands the path food takes after leaving their mouth. Observe for correct sequencing and use of gestures to show swallowing, moving down a tube, and churning in the stomach.

Extensions & Scaffolding

• Challenge early finishers to write a diary entry from the point of view of a piece of roti as it travels through the digestive system.
• For students who struggle, provide a word bank with pictures and allow them to match labels to the correct organs on their group chart before presenting.
• Deeper exploration: Invite students to research and present one surprising fact about how animals digest food differently, such as cows chewing cud or birds having gizzards.

Key Vocabulary

Digestion	The process where our body breaks down the food we eat into smaller pieces and nutrients that it can use for energy.
Oesophagus	A tube that carries food from the mouth down to the stomach.
Stomach	A J-shaped organ that mixes food with digestive juices, churning it into a semi-liquid paste.
Small Intestine	A long, coiled tube where most of the nutrients from food are absorbed into the body.
Nutrients	Substances in food that our body needs to grow, stay healthy, and have energy.