3rd Grade Science Lesson

Life Cycles: From Seeds to Bees — Plants, Animals, and Our Pollinator Garden

Shared by A STEM Educator

3rd Grade5e-learning-cycle3-LS1-1, 3-LS2-145 min

Learning Objective

Students will identify and sequence the four universal stages of a life cycle (birth, growth, reproduction, death) for at least two organisms (a flowering plant and an animal), compare complete metamorphosis to direct development, and explain why the reproduction stage is critical for pollinator gardens and agricultural crops.

Lesson Overview

Students explore the universal stages of life cycles (birth, growth, reproduction, death) across plants and animals, connecting to real-world pollinator garden management and crop timing. Students sort life stage cards, build comparative models, and investigate how disrupting reproduction affects populations.

Materials

Printed life stage cards (frog, butterfly, flowering plant — 1 set per pair)
Printed photos: mealworm beetle (larva, pupa, adult) and sunflower (seed, seedling, flower, seed head)
Large sorting mats (4 columns: Birth, Growth, Reproduction, Death) — 1 per group
Comparative matrix worksheet (blank 2-column table)
Crayons or colored pencils
Sticky notes (2 colors)
Anchor chart paper and markers
Optional: real sunflower seeds and a dried bean seed for tactile engagement
Pollinator garden scenario cards (1 per group for Elaborate phase)
Exit slip half-sheets (pre-printed)

Scaffolded Task Progression

1Task 1

Look at the two photos below — a mealworm beetle larva and a sunflower seed. Circle the word that describes what BOTH of these things are at the START of:
(A) Reproduction(B) Birth(C) Death(D) Growth. Then write one sentence explaining your choice. [ Interactive graph / diagram — available in the full lesson ]

2Task 2

Sort your life stage cards for the FROG, BUTTERFLY, and FLOWERING PLANT into the four columns on your sorting mat. After sorting, answer these questions on your recording sheet:
1. Which stage appears in ALL THREE organisms?
2. Which organism's growth stage looks MOST different from its adult form?
3. In our pollinator garden, bees visit flowers to collect nectar. Which life cycle stage of the plant are bees helping with? Explain.

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