• Quick retrieval from earlier learning (What plants need to grow; Test what a plant needs: light and water). Students answer on mini whiteboards.
• Show answers together and note who needs support in the main task.

1. A plant is not watered for a long time. What happens? (Its leaves turn blue. / It grows taller. / It wilts (droops) and may die. / It makes more flowers.) → It wilts (droops) and may die.Prompt: Plants need water to stay firm.
2. To test if plants need light, what must be the SAME for both plants? (nothing, everything should be different / only the colour of the pot matters / the amount of light / the water, the soil and the type of plant) → the water, the soil and the type of plantPrompt: We only want to change one thing.
3. What plants need: which statement is true? (Plants never need water. / Plants need light to grow well. / The more water you give a plant, the better it always grows. / Plants eat soil to get their food.) → Plants need light to grow well.Prompt: Think about what keeps a plant healthy.

• Bring in a plant that has been kept in the dark next to one in the light, and ask what happened.
• Share the objective: Plant growth experiments: read the results. Read the success criteria together.

• Work through the example out loud, saying why you do each step, not just what you do.
• Example: A sunflower seedling was 3 cm tall on Monday. Two weeks later it was 17 cm tall. How many centimetres did it grow?
• Step 1: 17 − 3 = 14
• Step 2: So the answer is: 14 cm
• Answer: 14 cm
• 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 bean plant was 2 cm tall on Monday. Two weeks later it was 16 cm tall. How many centimetres did it grow? → 14 cmPrompt: Growth is the change in height.
2. A plant kept in the dark grew tall, thin and pale. What do the results suggest? (Pale plants are the healthiest. / Darkness is the best way to grow plants. / It was stretching to find light and could not make enough food. / It had too much light.) → It was stretching to find light and could not make enough food.Prompt: Being tall is not the same as being healthy.

• 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. A sunflower seedling was 4 cm tall on Monday. Two weeks later it was 8 cm tall. How many centimetres did it grow? → 4 cmPrompt: Growth is the change in height.
2. A plant kept in the dark grew tall, thin and pale. What do the results suggest? (Pale plants are the healthiest. / It was stretching to find light and could not make enough food. / It had too much light. / Darkness is the best way to grow plants.) → It was stretching to find light and could not make enough food.Prompt: Being tall is not the same as being healthy.

Free online practice with hints and printable worksheets for this skill: eurekami.com/science/grade-2.