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

1. Temperatures (°C) on five days were 19, 17, 15, 13, 11. What was the mean temperature? Give 1 decimal place. → 15 °CPrompt: Add the temperatures.
2. Temperatures (°C) on five days were 24, 18, 21, 22, 22. What was the mean temperature? Give 1 decimal place. → 21.4 °CPrompt: Add the temperatures.
3. Temperatures (°C) on five days were 13, 13, 19, 19, 10. What was the mean temperature? Give 1 decimal place. → 14.8 °CPrompt: Add the temperatures.

• Show today's forecast and ask what it means for the class and how forecasters know.
• Share the objective: Compare rainfall month by month. Read the success criteria together.

• Work through the example out loud, saying why you do each step, not just what you do.
• Example: The rain gauge shows 0 mm for a whole month. What does this tell you?
• Step 1: An empty gauge means a dry month (if the gauge was working and not blocked).
• Step 2: So the answer is: No rain fell that month.
• Answer: No rain fell that month.
• 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. Why should a rain gauge be placed in an open space, away from trees and buildings? (So it stays in the shade. / So rain can fall straight in without being blocked or dripping off leaves. / It does not matter where it goes. / So birds can drink from it.) → So rain can fall straight in without being blocked or dripping off leaves.Prompt: What could a tree do to the rain falling over the gauge?
2. What instrument measures rainfall? (a barometer / a rain gauge / a wind vane / a thermometer) → a rain gaugePrompt: It collects rain in a container marked in millimetres.

• 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 6 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. Rainfall data for many years shows a place is wet in winter and dry in summer. What can people use this pattern for? (to decide what colour to paint houses / nothing; patterns are not useful / to change the weather / to plan when to plant crops and store water) → to plan when to plant crops and store waterPrompt: Farmers need to know when water will come.
2. What instrument measures rainfall? (a thermometer / a barometer / a rain gauge / a wind vane) → a rain gaugePrompt: It collects rain in a container marked in millimetres.

Free online practice with hints and printable worksheets for this skill: eurekami.com/science/grade-3.