Introduction to Biodiversity

Overview

This lesson introduces 3rd-grade students to the concept of biodiversity, focusing on the variety of plants and animals in their local environment. Using a colourful slideshow and an engaging video, students will discover why biodiversity matters and how it supports healthy ecosystems. This lesson is the first of eight in the broader unit, Exploring Local Ecosystems.

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Curriculum Connections

British Columbia Science Curriculum (Grade 3):

• Big Idea: Living things have features and behaviours that help them survive in their environments.
• Curricular Competencies:
  • Questioning and Predicting: Ask questions that can be investigated in the classroom or school grounds.
  • Reasoning and Analyzing: Interpret observations and communicate findings.
  • Communicating: Share ideas in a variety of ways.
• Content: Biodiversity as the variety of living things within a local ecosystem and why it matters (e.g., food, shelter, interdependence).
• Career Education: Recognizing the role of local environmental scientists and conservationists.

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Learning Objectives

By the end of the lesson, students will be able to:

• Define biodiversity in simple terms.
• Identify examples of local plants and animals that contribute to biodiversity.
• Explain why biodiversity is important for healthy ecosystems and people.
• Communicate their understanding through group discussion and a drawing activity.

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Materials

• Projector & screen
• Slideshow with images of local plants and animals (native trees, birds, insects, mammals)
• Short animated video (~5 minutes) illustrating biodiversity concepts in local ecosystems
• Large paper & coloured markers/crayons for group drawing
• Biodiversity vocabulary cards (e.g., ecosystem, species, habitat, diversity)

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Lesson Timeline (45 minutes)

1. Introduction & Engagement (5 minutes)

• Start with a brief class discussion: "What living things do you see around your school or home?"
• Write some examples on the board.
• Introduce the word biodiversity. Ask, "What do you think biodiversity means?" Use simple language: “Biodiversity means many different kinds of living things in one place.”

2. Slideshow Exploration (10 minutes)

• Show a slide presentation highlighting 8-10 local plants and animals (include common names and photos).
• For each, briefly describe its role (e.g., “This is a Douglas-fir tree. Birds build nests in it.”)
• Engage students by asking: “Have you ever seen this plant or animal? Where?”
• Use the vocabulary cards to define terms: species, habitat, ecosystem.

3. Video Presentation (5 minutes)

• Present a lively, age-appropriate video showcasing biodiversity in local ecosystems: e.g., animals interacting, plants growing, and how they all depend on each other.
• Immediately after, ask: “What did you notice about the different living things in the video?”

4. Group Activity: Biodiversity Mural (15 minutes)

• Divide students into 4 groups of 5.
• Each group receives large paper and art materials to draw a local ecosystem including at least 3 plants and 3 animals featured in the slideshow or video.
• Encourage them to think about how the living things might interact (e.g., birds eating insects, plants providing shade).
• Circulate and prompt: “Why do you think we need all these different living things together?”

5. Sharing & Reflection (8 minutes)

• Each group briefly shares their mural with the class, explaining their drawings and the living things they chose.
• Summarise key points emphasizing why biodiversity is important (clean air, food, shelter, balance).
• Ask students to state one new thing they learned about biodiversity.

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Assessment

• Formative assessment through observation of:
  • Participation in class discussions and responses to questions.
  • Contribution and collaboration during the biodiversity mural activity.
  • Ability to use vocabulary correctly when explaining their mural.
• Exit question: "Why is it important to have many different plants and animals living together?"

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Differentiation

• Provide vocabulary cards with pictures for ELL or students requiring language support.
• Allow drawing or verbal answers for students with different expression needs.
• Use prompts and sentence starters (e.g., “I included ____ because ____.”) during group activity.

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Extensions and Connections

• Suggest a nature walk around the schoolyard to observe biodiversity in real life for the next lesson.
• Invite a local conservationist or Indigenous knowledge keeper for a storytelling session about local ecosystems in later lessons.

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Teacher Notes

• Make sure slideshow images are local to British Columbia (e.g., Western Red Cedar, Pacific salmon, Garry oak).
• Use accessible language aligned with 8-9 year olds’ vocabulary and cognitive level.
• Highlight cultural respect for nature as part of BC’s diverse heritage briefly if time permits to enrich context.

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This engaging start sets a solid foundation for the unit, taps into students’ curiosity about the living world near them, and supports BC’s science competencies. It offers space for creativity, collaboration, and meaningful reflection on the importance of biodiversity.