Lesson Q4 L1 – Capstone Launch: A Biology Question for Our Community
Lesson Overview
Quarter 4 · Unit I: Ecology of the Garden and AP Review · Week 28 · AP Biology (Grades 10–12) · Lesson length: 50 minutes
Essential Question: What biological question about our garden or neighborhood food could our research help answer for the community?
Lesson Focus: Teams choose a capstone topic connecting their research to a community need and plan the quarter.
Why It Matters: Asking a testable question based on observations is skill 3.A, and proposing a new investigation from prior evidence is skill 3.D. The capstone connects ecology (Unit 8) to real decisions about food and heat in Phoenix.
Source: Adapted from the Seeds of Science community themes (Chapter 6 and Lesson 20); the capstone structure is new.
Standards & Learning Targets
Standards Alignment
AP Biology CED (Fall 2025) — Topics & Learning Objectives: Topic 8.6 Biodiversity (Unit 8: Ecology) — 8.6.A: Describe the relationship between ecosystem diversity and its resilience to changes in the environment.; 8.6.B: Explain how the addition or removal of any component of an ecosystem will affect its overall short-term and long-term structure.
AP Biology Science Practices / Skills: 3.A (Questions and Methods) — Identify or pose a testable question based on an observation, data, or a model; 3.D (Questions and Methods) — Propose a new investigation based on an evaluation of the experimental design or evidence
AP Biology Big Ideas: Big Idea 4 — Systems Interactions (SYI)
Student Learning Targets
Learning Targets — students will be able to
Identify a community need related to food, heat, pollinators, or biodiversity
Pose a capstone question linked to an AP Biology topic and prior class data
Plan tasks, roles, and a timeline toward the symposium
Key Vocabulary
capstone · stakeholder · community need · food access · urban heat island · pollinator · biodiversity · project timeline
Materials & Teacher Prep
| Materials Needed | Teacher Prep Checklist |
|---|---|
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Lesson Flow & Timing
| Engage · 6 min | Explore · 18 min | Explain · 8 min | Elaborate · 12 min | Evaluate · 6 min |
|---|---|---|---|---|
| What our neighbors need | Topic exploration (Corners) | Capstone expectations | Team plan and timeline | Exit ticket + AP item |
Phase 1 · Engage — The Hook
Teacher Talk
PCM: Curiosity. Print or project a map of the neighborhood around 1634 N 19th Ave with grocery stores, parks, and gardens. “If our garden could solve one problem for our neighbors, what would it be?” Introduce capstone briefly now so the discussion stays precise; the formal definition comes in Explain.
Ask Students
“Who lives and works near our garden?” “What do they need?” “What do we know that could help?”
PCM Differentiation
Thinker Students: Rank three capstone topics by how much our existing data can support each, and justify your ranking.
Harmonizer Students: The capstone is a gift to our community. Who do you most want to help, and why?
Phase 2 · Explore — Kagan Cooperative Activity
Cooperative Structure
Kagan structure: Corners. Students move to the corner of the room labeled with the capstone topic that interests them most, discuss reasons with others there, and share with another corner (See the Teaching Reference for the structure’s steps.) Before teams start, introduce the term stakeholder so students can use it accurately; Explain gives the formal definition.
Step-by-Step
- Step 1 — Choose (4 min): Students read menu cards and move to a corner.
- Step 2 — Discuss (8 min): Corner groups list questions, needed data, and stakeholders.
- Step 3 — Share (6 min): Each corner shares one question; students may switch corners before forming teams.
Teacher Moves During Explore
Ask “Which AP topic does this question connect to?”
Push for questions the class can actually investigate
Encourage balanced team sizes
Phase 3 · Explain — Direct Instruction
Mini-lesson — Capstone Expectations. Teacher move: Review deliverables: IMRaD report, poster, community solution, symposium presentation.
A strong capstone question is testable, builds on prior data, and matters to a real audience
Stakeholders include neighbors, families, gardeners, and city or nonprofit partners
Deliverables: IMRaD report, peer review, poster, community solution proposal, and symposium presentation
Teams use the same design standards as earlier investigations: controls, replication, and appropriate statistics
The timeline must leave time for AP review in Lessons 4.10 and 4.11
Key Message: The capstone turns our garden research into knowledge our community can use, built on careful questions and evidence.
Check for Understanding — Ask Students
“What makes a capstone question strong?” “Who are your stakeholders?” “Which AP topic connects to your question?”
Phase 4 · Elaborate — Student Product & Differentiation
Student Product
Each team submits a capstone question, stakeholder list, role assignments, and timeline.
Differentiation
Support (scaffolded entry): Provide a question-builder frame and a sample timeline.
AP Extension: Identify a local expert or organization and draft three interview questions (teacher review before contact).
Multilingual Learners: Use a visual timeline with icons for each deliverable.
Phase 5 · Evaluate — Closure, Exit Ticket & Assessment
Exit Ticket
- Our capstone question is ___.
- Our stakeholders are ___.
- One task I own is ___.
Answer Key / Look-Fors: Look for a testable question, specific stakeholders, and a named task.
AP Exam Practice
(MCQ) A team wants to know whether native flowers planted next to radish beds increase seed set by attracting pollinators. Which design is best?
(A) Plant flowers next to all beds and count seeds (B) Randomly assign beds to have flowers or no flowers, then compare seed set with replication (C) Ask neighbors whether they see more bees (D) Count bees on one day only
Answer & Rationale: (B). Random assignment with a control and replication isolates the effect of flowers. (A) lacks a control; (C) and (D) are weak data.
Expanding Circles
How does this connect to… Self — What does your family need from the neighborhood? • Classroom — What has our class built together? • School — How could our school support neighbors? • Community — Which Phoenix organizations work on food access? • World — How do communities worldwide use gardens to address hunger?
Formative Assessment
Formative Assessment (sort students by the capstone question, stakeholder list, roles, and timeline, the matching exit-ticket answers, and the AP item)
Meets (3): Testable question, clear stakeholders, complete timeline.
Approaching (2): Question vague or timeline incomplete.
Not Yet (1): No clear question; meet with team to refine.
Extend & Looking Ahead
Extension: Map community gardens and food sources within 1 mile of the garden using public data.
Looking Ahead: Lesson 4.2 explores how evolution continues today in pests and weeds.