Lesson: Living Things and Habitats
Year: 6 | Subject: Science | Time Allocation: 100%
Class/Set: ____________ Date/Term: ____________
LO (WALT): To classify living things into broad groups according to common observable characteristics.
Success Criteria (WILF):
- I can describe how living things are classified into broad groups (Kingdoms).
- I can identify the specific characteristics of micro-organisms, plants, and animals.
- I can use and create a classification key to identify species.
1. Starter (15%)
- Activity: The 'Odd One Out' Retrieval.
- Display: Images of a Yeast cell, a Great Oak tree, a Red Fox, and a Portobello Mushroom.
- Discuss: Students must justify which one is the 'odd one out' based on biological kingdoms rather than appearance.
- Challenge: Can students name the five kingdoms of life? (Animals, Plants, Fungi, Protists, Monera/Bacteria).
2. Main Activity (70%)
Teacher Input:
- Explain: Introduce Carl Linnaeus and the Linnaean system. Briefly explain the hierarchy: Kingdom, Phylum, Class, Order, Family, Genus, Species.
- Model: Demonstrate how to use a branching classification key to identify a specific micro-organism (e.g., distinguishing between Algae and Bacteria).
- Define: Use 'Tier 2' and 'Tier 3' vocabulary: invertebrate, vertebrate, specimen, and micro-organism.
- Check: Use mini-whiteboards to ask: "Which kingdom does a common mould belong to?" (Fungi).
Student Task:
- Classify: Students use a provided set of 8 species cards (including a Tardigrade, a Bluebell, and a Grey Squirrel).
- Task A: Complete a table categorising each specimen into its correct Kingdom and Phylum.
- Task B: Create a dichotomous branching key (Yes/No questions) to separate four local garden species: Woodlouse, Earthworm, Snail, and Spider.
- Evaluate: Students must write one sentence explaining why a 'Virus' is often difficult to classify compared to a 'Bacterium'.
- Support: Provide a 'Word Bank' of characteristics (e.g., 'has chlorophyll', 'multicellular', 'microscopic').
3. Plenary (15%)
- Check: 'Hinge Question' - "If two animals are in the same 'Family', must they also be in the same 'Class'?" (Yes).
- Consolidate: Quick-fire 'True or False' regarding micro-organisms (e.g., "All bacteria are harmful to humans").
- Reflect: Ask students to identify one way classification helps scientists protect endangered habitats.
4. Resources
- Species specimen cards (Set A).
- A3 sugar paper and Pritt sticks for branching keys.
- Linnaean hierarchy diagrams.
- Exercise books and pens.
⚠ TEACHER’S GUIDANCE
💡 Pedagogical Insights
- Oracy Focus: Encourage students to use formal scientific language during the starter. Instead of saying "it looks different," prompt for "it lacks a cell wall" or "it is a multicellular organism."
- Common Misconception: Many Year 6 students believe all micro-organisms are 'germs' or harmful. Ensure you highlight the role of yeast in bread or 'good' bacteria in the gut during the Explain phase.
- Differentiation: For Greater Depth (GDS) students, challenge them to research why the Linnaean system has evolved into the 'Three-Domain System' (Archaea, Bacteria, Eukarya).
🔍 Answer Key & Solutions
- Starter Odd One Out: Multiple valid answers, but the scientific focus should be: Yeast/Mushroom are Fungi, Oak is a Plant, Fox is an Animal.
- Task A (Classification Table):
- Grey Squirrel: Kingdom: Animals | Phylum: Chordates (Vertebrates).
- Bluebell: Kingdom: Plants | Phylum: Vascular Plants.
- Tardigrade: Kingdom: Animals | Phylum: Tardigrada (Invertebrates).
- Task B (Branching Key):
- Question 1: Does it have legs? (No = Snail/Earthworm | Yes = Woodlouse/Spider).
- Question 2 (No): Does it have a shell? (Yes = Snail | No = Earthworm).
- Question 3 (Yes): Does it have 8 legs? (Yes = Spider | No = Woodlouse).
- Evaluation Task: Viruses are difficult to classify because they do not carry out all seven life processes (MRS GREN) independently, specifically reproduction without a host cell.
⚠ Safety & Nuance Check
- Micro-organisms: If using real bread mould samples, ensure they are sealed in petri dishes with Parafilm. Do not allow students to open the dishes due to spore allergies and respiratory safety.