Science (EVS K-5) · Class 3

Active learning ideas

What Happens to Food Inside Our Body

Active learning helps students remember the digestive process because they physically act out each step. When they move their bodies or draw the path, they connect abstract concepts to real experiences.

• CBSE Learning Outcomes
• NCERT: Class 7, Chapter 2: Nutrition in Animals

• 15–25 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Hot Seat
• 25 min · Small Groups

Digestive Journey Role-Play

Children form a human chain representing mouth, stomach, and intestines. Pass a ball of roti dough through each 'organ' while describing actions like chewing and mixing with juices. Discuss changes at each step.

What happens to a roti when you chew it? How does it change?

Facilitation Tip

In Digestive Journey Role-Play, position students in a straight line to mimic the food path from mouth to anus so they see the order clearly.

What to look for

Show students a simple diagram of the digestive system with labels missing. Ask them to label the mouth, stomach, small intestine, and large intestine. Then, ask them to draw an arrow showing the direction food travels.

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

Activity 02

• Hot Seat
• 15 min · Pairs

Enzyme Action Demo

Mix biscuit crumbs with water and lemon juice to show breakdown. Compare with dry crumbs to highlight enzyme role. Children observe and note differences.

Why do our bodies need to break down food before we can use it?

Facilitation Tip

For Enzyme Action Demo, use a piece of bread soaked in water and another in vinegar to show how acids break food down differently.

What to look for

Pose the question: 'Imagine you eat a piece of fruit. What are the first two things that happen to it inside your body and where do these actions happen?' Listen for student responses that mention chewing, saliva, and the mouth.

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

Activity 03

• Hot Seat
• 20 min · Individual

Food Path Drawing

Draw and label the digestive system on chart paper. Use arrows to show food movement and colour organs. Share drawings with class.

Where does the food you eat go after it leaves your mouth?

Facilitation Tip

During Food Path Drawing, provide a large chart with the digestive organs already drawn so students focus on labeling and arrows only.

What to look for

Give each student a small slip of paper. Ask them to write down one organ of the digestive system and one job that organ does. Collect these as students leave the classroom.

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

Activity 04

• Hot Seat
• 20 min · Whole Class

What Happens to Roti?

Chew roti, spit into bag, add water and shake to mimic stomach. Observe mushy texture and discuss nutrient release.

What happens to a roti when you chew it? How does it change?

What to look for

Show students a simple diagram of the digestive system with labels missing. Ask them to label the mouth, stomach, small intestine, and large intestine. Then, ask them to draw an arrow showing the direction food travels.

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

A few notes on teaching this unit

Teachers should avoid saying digestion happens only in the mouth. Instead, start with a familiar food like roti to show how it changes at each stage. Use simple analogies such as a blender breaking food down in the stomach to make the process concrete. Research shows students grasp digestion better when they connect each step to a real-life example they can see.

By the end, students should describe the digestive journey clearly and explain how food changes at each stage. They should use terms like saliva, acid, and absorption correctly in conversations and drawings.

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Watch Out for These Misconceptions

• During Digestive Journey Role-Play, watch for students who say food goes straight to the blood without mentioning digestion in the mouth, stomach, or intestines.

  Use the role-play to pause at each organ and ask students to explain what happens there before moving on.

• During Enzyme Action Demo, watch for students who believe digestion stops after chewing or only happens in the mouth.

  After showing the bread in vinegar, ask students to compare the soaked bread to chewed food and explain why acids are important in the stomach.

• During Food Path Drawing, watch for students who think the body uses whole pieces of food without breaking them down.

  Have students label each organ with a sentence describing how food changes there, such as 'Stomach uses acid to break food into a paste.'

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Methods used in this brief

• Hot Seat