Young Explorers: Investigating Our World · 2nd Year

Active learning ideas

Keeping Healthy and Strong

Active learning works because students connect abstract body functions to concrete, measurable experiences. When students feel their pulse race or sort real foods, they anchor new concepts in personal observation, making science memorable and meaningful.

• NCCA Curriculum Specifications
• NCCA: Primary - Living Things
• NCCA: Primary - Myself

• 20–35 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Case Study Analysis
• 25 min · Pairs

Pulse Challenge: Heart Rate Check

Pairs find resting heart rate by counting wrist pulses for 15 seconds and multiplying by four. One partner does 20 star jumps while the other times, then switch and re-measure. Groups chart results and share why rates increased.

Explain the physiological reason for our hearts beating faster during exercise.

Facilitation Tip

During Pulse Challenge, have students record their resting pulse twice to ensure accuracy before comparing it to their post-exercise pulse.

What to look for

Ask students to hold their wrist and count their pulse for 30 seconds. Then, have them do 20 jumping jacks and count again. Ask: 'What happened to your pulse? Why do you think that happened?' Record their answers.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

Activity 02

• Case Study Analysis
• 30 min · Small Groups

Food Sort Station: Energy Foods

Small groups receive pictures or real items of foods like apples, cheese, bread, and sweets. Sort into 'quick energy' (carbs), 'body builders' (proteins), and 'protectors' (vitamins). Discuss choices with class vote on daily picks.

Assess how to identify foods that provide the most energy for our bodies.

Facilitation Tip

At the Food Sort Station, place real food packages with visible labels so students can connect nutrition facts to their sorting decisions.

What to look for

Provide students with a small card. Ask them to write down one food they ate today that gives them energy and one way they practiced good hygiene today. Collect and review for understanding of key concepts.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

Activity 03

• Case Study Analysis
• 35 min · Small Groups

Teeth Guard Relay: Hygiene Race

Teams line up for relay: brush model teeth with disclosing tablets to reveal plaque, rinse, then identify sugary foods to avoid. Fastest accurate team wins; debrief on bacteria-acid process.

Predict the consequences for our teeth if dental hygiene practices were neglected.

Facilitation Tip

In the Teeth Guard Relay, provide plaque-disclosing tablets so students can see where brushing missed, making hygiene consequences visible.

What to look for

Pose the question: 'Imagine you stopped brushing your teeth for a whole week. What would happen to your teeth and gums?' Facilitate a class discussion, guiding students to mention plaque buildup, bad breath, and potential pain.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

Activity 04

• Case Study Analysis
• 20 min · Whole Class

Healthy Habit Tracker: Whole Class Chart

Class brainstorms exercise, food, and hygiene habits, then tracks personal daily practice on a shared chart with stickers. Review weekly to spot patterns and set goals.

Explain the physiological reason for our hearts beating faster during exercise.

What to look for

Ask students to hold their wrist and count their pulse for 30 seconds. Then, have them do 20 jumping jacks and count again. Ask: 'What happened to your pulse? Why do you think that happened?' Record their answers.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

A few notes on teaching this unit

Teach this topic by letting students discover evidence through structured exploration rather than direct explanation. Avoid telling students the answers too soon; instead, guide them to observe changes and ask questions. Research shows that when students predict outcomes before activities, they retain concepts longer. Keep discussions focused on observable data from the activities to correct misconceptions naturally.

Successful learning looks like students using evidence from activities to explain why exercise changes heart rate, distinguishing energy foods from other nutrients, and describing daily hygiene routines that prevent decay. They should confidently share their findings with peers using accurate vocabulary.

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Watch Out for These Misconceptions

• During Pulse Challenge, watch for students who say the heart beats faster because it is scared or tired.

  Redirect by having students feel their pulse before and after exercise, then ask, 'What did your muscles need more of during jumping jacks? How did your pulse help meet that need?' Guide them to connect faster beats to oxygen delivery.

• During Food Sort Station, watch for students who say all foods provide the same energy for the body.

  Challenge students to taste-test crackers and nuts, then ask, 'Which one gave you energy faster? Why do you think that was?' Use food labels to show carbohydrate versus protein content, linking energy to specific nutrients.

• During Teeth Guard Relay, watch for students who say brushing once a day is enough to keep teeth healthy.

  Use plaque-disclosing tablets to show buildup on teeth after one day without brushing. Ask, 'What do you see on the model? How does this relate to real teeth after a week without brushing?' Guide students to predict decay from visible plaque.

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Methods used in this brief

• Case Study Analysis