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Science lesson plan · 3rd grade (Year 4 in England) · 45 minutes

Pollination and seed dispersal

Plants

CCSS NGSS.2-LS2-2CCSS NGSS.3-LS1-1England: KS2 Y3 Plants

Objective and success criteria

Students will: Pollination and seed dispersal.

  • I can answer questions on today's skill on my own, without help.
  • I can explain each step and say why it works.
  • I can check my answer and spot a mistake.

Before and after

Needs first: Parts of a plant

Leads to: Plant reproduction: seeds versus runners, bulbs, tubers and cuttings

Materials: Real plants or seeds, Hand lenses, Mini whiteboards, A diagram or short video clip of the idea, Printed student sheet (below).

Warm-up · 5 min

  • Quick retrieval from earlier learning (Parts of a plant). Students answer on mini whiteboards.
  • Show answers together and note who needs support in the main task.
  1. The trunk of a tree is a very thick… (leaf / stem / flower / root) → stemPrompt: It holds the tree up.
  2. Plant parts: which statement is true? (Leaves take in water from the soil. / Only flowers are part of a plant. / Roots hold a plant in the ground. / Roots grow up towards the sky.) → Roots hold a plant in the ground.Prompt: Picture a plant from its roots to its flower.
  3. Which part of a plant takes in water from the soil? (the leaves / the roots / the stem / the flower) → the rootsPrompt: Which part is under the ground?

Hook · 5 min

  • Bring in a plant that has been kept in the dark next to one in the light, and ask what happened.
  • Share the objective: Pollination and seed dispersal. Read the success criteria together.

I do: model it · 10 min

  • Work through the example out loud, saying why you do each step, not just what you do.
  • Example: How are the seeds of this plant mainly spread: burdock burrs?
  • Step 1: Hooked seeds stick to fur; seeds in tasty fruit are eaten and dropped elsewhere; nuts are buried and forgotten.
  • Step 2: So the answer is: animals
  • Answer: animals
  • Pause after each step and ask a student to say what comes next.

We do: guided practice · 10 min

  • Do these together. Students try each step on whiteboards before you reveal it.
  • Use the hints as prompts rather than giving the answer.
  1. How are the seeds of this plant mainly spread: thistle? (wind / animals / water / exploding pods) → windPrompt: Are the seeds light and fluffy, hooked or tasty, able to float, or in a pod?
  2. What is pollination? (leaves falling in autumn (fall) / moving pollen from the male part of a flower to the female part / watering a plant / planting seeds in soil) → moving pollen from the male part of a flower to the female partPrompt: Pollen has to reach the stigma.

You do: independent practice · 10 min

  • 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.

Exit ticket · 5 min

  • Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.
  1. Why do many flowers have bright petals and a sweet smell? (to take in water / to scare animals away / to keep warm / to attract insects that carry pollen) → to attract insects that carry pollenPrompt: Which visitors do flowers want?
  2. Which plant's seeds are mainly spread by exploding pods? (burdock burrs / thistle / Himalayan balsam / water lily) → Himalayan balsamPrompt: Think about the shape of each seed or fruit.

Watch out for

  • Everyday meanings of words getting in the way of the science meaning: define key words explicitly.
  • Remembering facts without the reason: ask "why?" and "what is the evidence?"

Support and stretch

Support

  • Review first: Parts of a plant.
  • Use concrete materials: real plants or seeds.
  • Give the first step of each question, or a partly worked example to finish.
  • Pair with a confident partner for the guided practice.

Stretch

  • Move on to: Plant reproduction: seeds versus runners, bulbs, tubers and cuttings.
  • Explain a common mistake in writing and how to fix it.
  • Write a word problem that uses today's skill, then solve a partner's.

Homework and more practice

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

Free lesson plan from eurekami.com/lesson-plan-builder

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Pollination and seed dispersal

Name

Date

Score/ 8

  1. Question 1

    How are the seeds of this plant mainly spread: water lily?

    • A. wind
    • B. animals
    • C. water
    • D. exploding pods
  2. Question 2

    Which plant's seeds are mainly spread by water?

    • A. broom pods
    • B. sycamore (maple)
    • C. thistle
    • D. coconut
  3. Question 3

    Grass flowers are small and green with no scent. How are they pollinated?

    • A. they are never pollinated
    • B. by the wind
    • C. by bees
    • D. by birds only
  4. Question 4

    How are the seeds of this plant mainly spread: coconut?

    • A. wind
    • B. animals
    • C. water
    • D. exploding pods
  5. Question 5

    Which plant's seeds are mainly spread by exploding pods?

    • A. gorse
    • B. sea bean
    • C. cherries
    • D. coconut
  6. Question 6

    Why do many flowers have bright petals and a sweet smell?

    • A. to keep warm
    • B. to scare animals away
    • C. to attract insects that carry pollen
    • D. to take in water
  7. Question 7

    How are the seeds of this plant mainly spread: blackberries?

    • A. wind
    • B. animals
    • C. water
    • D. exploding pods
  8. Question 8

    What is pollination?

    • A. moving pollen from the male part of a flower to the female part
    • B. planting seeds in soil
    • C. watering a plant
    • D. leaves falling in autumn (fall)

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Answer key: Pollination and seed dispersal

  1. 1. C. water

  2. 2. D. coconut

  3. 3. B. by the wind

  4. 4. C. water

  5. 5. A. gorse

  6. 6. C. to attract insects that carry pollen

  7. 7. B. animals

  8. 8. A. moving pollen from the male part of a flower to the female part