Ecosystems Basics

Overview

In this first of 10 unit lessons, students explore what an ecosystem is by looking at habitats and the living things found there. They create a simple, Year 1-ready food chain model and begin identifying where organisms get energy.

Learning intentions

• Students will be able to describe an ecosystem as a place where living things and nonliving things interact.
• Students will be able to identify habitats and name at least one organism found in each habitat.
• Students will be able to use pictures/words to build a simple food chain (Year 1) or explain one (Year 5).
• Students will be able to communicate their thinking clearly using drawings, labels, and short sentences.

Success criteria

• I can explain that an ecosystem includes both living things and nonliving parts.
• I can match organisms to a habitat using evidence (picture/label).
• I can create a simple food chain and state who eats whom (Year 1) or justify how energy moves through the chain (Year 5).
• I can share my work with correct vocabulary words (habitat, organism, producer, consumer, food chain) with support if needed.

Curriculum links

• Writing and speaking: produce short informative/explanatory text and present it with clear details.
• Reading informational text: ask and answer questions about key details in a science passage or read-aloud.
• Language: use grade-appropriate conventions, build vocabulary, and communicate ideas clearly.
• Science and engineering practices: observe, classify, and describe patterns using evidence.

Lesson structure (240 minutes)

1. 0–25 min: Hook with “What’s in a habitat?”

• Teacher shows 3 picture cards (pond, forest, desert) and asks students to point to nonliving features (water/sun/sand) and living things they notice.
• Year 1 records by drawing two items (one living, one nonliving) for one habitat; Year 5 writes 2–3 sentences describing how the habitat supports life.

2. 25–55 min: Read-aloud + question time

• Read a kid-friendly informational passage about ecosystems and habitats (or teacher creates a short script with visuals).
• Students pause to answer teacher prompts: “What is an ecosystem?” “What do living things need?” “Which organism is a plant/animal?” Year 1 uses answer choices; Year 5 gives short written answers.

3. 55–95 min: Habitat sorting activity (hands-on)

• Provide organism picture cards (grass/tree, insects, rabbit/deer, fish/frog, cactus/shrub, etc.) and habitat cards.
• Year 1 sorts 6 cards into habitats and labels with 1–2 words.
• Year 5 sorts and also categorizes at least 2 organisms as producers or consumers, explaining their choices in a sentence.

4. 95–125 min: Mini-lesson on food chains

• Teacher models one example food chain using sticky notes or a diagram: producer → herbivore → carnivore.
• Year 1 practice: students build a 3-link chain with three picture cards.
• Year 5 practice: students build a 4-link chain and write a short explanation of how energy moves (one paragraph or 4–6 sentences).

5. 125–155 min: Create an “Ecosystem Snapshot”

• Students make a one-page snapshot poster for a chosen habitat.
• Year 1 includes: habitat title, 3 labeled pictures (living things), and a 3-link food chain.
• Year 5 includes: habitat description, nonliving needs, producer/consumer labels, and a complete food chain with reasoning.

6. 155–210 min: Share, revise, and gallery walk

• Students present to each other (homeschool parent facilitates). Each student gives a 30–60 second explanation.
• Teacher uses a revision goal: add one missing detail (a nonliving factor for Year 5, or add one label/arrow for Year 1). Students improve their posters.

7. 210–240 min: Quick assessment + cleanup routine

• Students complete a short, teacher-checked task (details below).
• Both students reflect: “One new thing I learned about ecosystems is…” using a sentence starter or short sentence.

Resources

• Habitat picture cards (pond/forest/desert) and organism picture cards (plants/animals)
• Simple ecosystem diagram (living + nonliving) on chart paper
• Food chain arrow cards or sticky notes
• Student recording sheets: Habitat Sorting (simple) and Ecosystem Snapshot (expanded)
• Markers, crayons, and scissors/glue (or tape)
• Timer for structured rotation and share time
• Optional: a short teacher script for the read-aloud (2–4 minutes worth of chunks)

Assessment

• Observation checklist during sorting: correct habitat match, use of producer/consumer vocabulary for Year 5 when applicable.
• Poster review: food chain has correct order and arrows; ecosystem snapshot includes living and nonliving elements.
• Exit task: each student answers one prompt correctly (Year 1: “Name one habitat and one living thing there”; Year 5: “Explain how energy moves through your food chain.”)

Differentiation

• Year 1 support:
• Use sentence frames (“In a ____ ecosystem, I see ____.”) and limited card choices (6–8 organisms total).
• Allow drawing labels only (no full sentences) if needed.
• Year 1 extension:
• Add a second food chain link (producer → herbivore → carnivore → top predator) with picture-only support.
• Year 5 support:
• Provide a word bank and model paragraph structure (“A habitat has…, Living things need…, In my food chain…, Producers are…”).
• Permit oral responses recorded by the teacher if writing is a barrier.
• Year 5 extension:
• Add one “what would happen if…” question (e.g., remove the producer) and write a cause-and-effect prediction for at least one organism.

Extension (optional)

None requested for this first lesson.