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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… (stem / leaf / flower / root) → stemPrompt: It holds the tree up.
  2. Plant parts: which statement is true? (Roots grow up towards the sky. / Leaves take in water from the soil. / A tree trunk is a stem. / Only flowers are part of a plant.) → A tree trunk is a stem.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. Grass flowers are small and green with no scent. How are they pollinated? (they are never pollinated / by the wind / by birds only / by bees) → by the windPrompt: They do not need to attract insects.

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 attract insects that carry pollen / to scare animals away / to take in water / to keep warm) → to attract insects that carry pollenPrompt: Which visitors do flowers want?
  2. How are the seeds of this plant mainly spread: coconut? (wind / animals / water / exploding pods) → waterPrompt: Are the seeds light and fluffy, hooked or tasty, able to float, or in a pod?

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

    Which plant's seeds are mainly spread by animals?

    • A. thistle
    • B. broom pods
    • C. acorns buried by squirrels
    • D. willowherb
  2. Question 2

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

    • A. wind
    • B. animals
    • C. water
    • D. exploding pods
  3. Question 3

    What is pollination?

    • A. watering a plant
    • B. leaves falling in autumn (fall)
    • C. moving pollen from the male part of a flower to the female part
    • D. planting seeds in soil
  4. Question 4

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

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

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

    • A. to scare animals away
    • B. to take in water
    • C. to attract insects that carry pollen
    • D. to keep warm
  6. Question 6

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

    • A. coconut
    • B. acorns buried by squirrels
    • C. gorse
    • D. water lily
  7. Question 7

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

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

    How are the seeds of this plant mainly spread: sea bean?

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

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Answer key: Pollination and seed dispersal

  1. 1. C. acorns buried by squirrels

  2. 2. A. wind

  3. 3. C. moving pollen from the male part of a flower to the female part

  4. 4. A. wind

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

  6. 6. C. gorse

  7. 7. C. water

  8. 8. C. water