• Quick retrieval from earlier learning (Reading tables and line graphs). Students answer on mini whiteboards.
• Show answers together and note who needs support in the main task.

1. Water temperature (°C) → Time to dissolve (s) 2 → 55 10 → 48 30 → 41 8 → 34 50 → 27 What happens to “Time to dissolve (s)” as “Water temperature (°C)” increases? (it stays the same / it increases / it decreases / it goes up then down) → it decreasesPrompt: Read down the second column. Are the numbers getting bigger or smaller?
2. Distance from lamp (cm) → Bubbles from pondweed per minute 2 → 49 10 → 43 15 → 37 20 → 31 25 → 25 What happens to “Bubbles from pondweed per minute” as “Distance from lamp (cm)” increases? (it increases / it decreases / it stays the same / it goes up then down) → it decreasesPrompt: Read down the second column. Are the numbers getting bigger or smaller?
3. Water temperature (°C) → Time to dissolve (s) 5 → 59 20 → 54 15 → 49 8 → 44 50 → 39 What happens to “Time to dissolve (s)” as “Water temperature (°C)” increases? (it goes up then down / it increases / it stays the same / it decreases) → it decreasesPrompt: Read down the second column. Are the numbers getting bigger or smaller?

• Show a simple experiment with one thing changed and ask what makes it a fair test.
• Share the objective: Repeat readings, means and anomalies. Read the success criteria together.

• Work through the example out loud, saying why you do each step, not just what you do.
• Example: A group measured a pulse rate after exercise three times: 103, 101 and 100 bpm. What is the mean? Give your answer to 1 decimal place.
• Step 1: 103 + 101 + 100 = 304
• Step 2: 304 ÷ 3 = 101.33
• Step 3: So the answer is: 101.3 bpm
• Answer: 101.3 bpm
• 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. A group measured the temperature rise in a reaction three times: 19, 16 and 17 °C. What is the mean? Give your answer to 1 decimal place. → 17.3 °CPrompt: Add the three readings.
2. Four repeat readings of how far a toy car travelled (cm): 50, 26, 48, 49. Which reading is anomalous (does not fit the pattern)? (26 / 50 / 48 / 49) → 26Prompt: Most of the readings are close together.

• 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. A group measured a pulse rate after exercise three times: 139, 137 and 142 bpm. What is the mean? Give your answer to 1 decimal place. → 139.3 bpmPrompt: Add the three readings.
2. Four repeat readings of a pulse rate after exercise (bpm): 103, 103, 63, 104. Which reading is anomalous (does not fit the pattern)? (63 / 103 / 104) → 63Prompt: Most of the readings are close together.

Free online practice with hints and printable worksheets for this skill: eurekami.com/science/grade-6.