• Quick retrieval from earlier learning (Heart, blood and circulation; Exercise and your body: heartbeat and breathing). Students answer on mini whiteboards.
• Show answers together and note who needs support in the main task.

1. Zoe counts 15 pulse beats in 30 seconds. What is the pulse rate in beats per minute? → 30Prompt: How many lots of 30 seconds are there in one minute?
2. Why does your heart beat faster when you run? (Your lungs stop working. / Your heart gets scared. / Your blood gets heavier. / Your muscles need more oxygen and glucose.) → Your muscles need more oxygen and glucose.Prompt: Working muscles respire faster.
3. Liam counts 21 pulse beats in 20 seconds. What is the pulse rate in beats per minute? → 63Prompt: How many lots of 20 seconds are there in one minute?

• Ask everyone to find their pulse, then jump for 30 seconds and find it again.
• Share the objective: How diet, exercise and harmful substances affect the body. Read the success criteria together.

• Work through the example out loud, saying why you do each step, not just what you do.
• Example: Does this help or harm the body: drinking water instead of fizzy drinks?
• Step 1: These choices keep the heart, lungs, muscles and brain healthy.
• Step 2: So the answer is: helps the body
• Answer: helps the body
• Pause after each step and ask a student to say what comes next.

• Do these together. Students try each step on whiteboards before you reveal it.
• Use the hints as prompts rather than giving the answer.

1. Does this help or harm the body: breathing in other people's smoke? (helps the body / harms the body) → harms the bodyPrompt: Think about the heart, lungs, teeth and energy.
2. Why does too much sugar harm your health? (Sugar is a vitamin. / Sugar has no energy. / It can cause tooth decay and unhealthy weight gain. / Sugar makes bones stronger.) → It can cause tooth decay and unhealthy weight gain.Prompt: What do mouth bacteria feed on?

• Students work on the student sheet. Circulate and check the first two answers of every student early.
• Students who finish: write a question of their own for a partner, with the answer.

The 8 questions are on the student sheet below, with answers in the key.

• Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.

1. Does this help or harm the body: getting enough sleep? (helps the body / harms the body) → helps the bodyPrompt: Think about the heart, lungs, teeth and energy.
2. Why does too much sugar harm your health? (Sugar makes bones stronger. / It can cause tooth decay and unhealthy weight gain. / Sugar has no energy. / Sugar is a vitamin.) → It can cause tooth decay and unhealthy weight gain.Prompt: What do mouth bacteria feed on?

Free online practice with hints and printable worksheets for this skill: eurekami.com/science/grade-5.