Aquaculture Systems

Overview

In this lesson (2 of 3) students explore two main aquaculture system types: pond systems and recirculating systems. They discuss benefits and challenges and consider how these choices affect sustainability.

Learning intentions

• Students will identify and describe different aquaculture systems.
• Students will explain how system design can support sustainability and manage challenges.

Success criteria

• I can list at least two types of aquaculture systems.
• I can explain one benefit for each system I name.
• I can explain one challenge for each system I name.
• I can use a concept map to show relationships between systems, benefits, challenges, and sustainability.

Curriculum links

• Science inquiry skills: asking questions, making observations, using evidence to explain ideas.
• Science understanding: living things and how environments can be managed to support growth.
• Sustainability focus: considering how human actions affect environments and resources over time.
• Communicating: using scientific language to share ideas in discussions and written/visual representations.

Lesson structure (45 minutes)

1. 4 Welcome & recap Briefly recap Lesson 1: what aquaculture is and why people farm aquatic animals/plants. Display today’s lesson question: “How do aquaculture systems differ, and what are their impacts?”

2. 6 Mini lesson: system types Teach with a simple comparison:

• Pond systems: animals live in outdoor ponds or enclosures; water exchange happens naturally or with support.
• Recirculating systems: water is cleaned and reused through filters and pumps; conditions are controlled. Check understanding with quick “thumbs” questions (e.g., “Which system uses reused water?”).

3. 7 Dyslexia-friendly input (teacher read + student track) Provide a one-page handout with headings and bullet points: “Pond systems” and “Recirculating systems,” including highlighted keywords (pond, filters, pumps, reuse, water quality, oxygen). Read aloud once, then students reread silently or with a partner.

4. 13 Group task: benefits and challenges Place students in mixed-ability groups of about 4–5. Each group completes a concept map with two branches:

• Branch A: Pond system (benefit + challenge)
• Branch B: Recirculating system (benefit + challenge) Support prompts:
• “What helps this system?” (benefits)
• “What might be difficult or risky?” (challenges)
• “How could this affect sustainability?” Teacher circulates, using sentence starters for those who need them, and asks groups to justify choices with “Because…” statements.

5. 8 Class share: gallery talk Groups share one key benefit and one key challenge for each system. Teacher records common ideas on the board using consistent scientific terms and clarifies misconceptions (e.g., that all systems need proper water quality and care).

6. 6 Exit ticket: match + explain Students complete two short responses:

• Write one type of aquaculture system and one benefit.
• Write one type of aquaculture system and one challenge. Option for a quick labelled sketch (e.g., “pond” or “recirculating” with key words).

7. 1 Wrap-up & link to Lesson 3 Preview Lesson 3: students will examine real-world aquaculture choices and how to improve sustainability (e.g., responsible feeding, water management, and impacts).

Resources

• One-page dyslexia-friendly handout (clear headings, bullet points, highlighted keywords)
• Concept map templates (two-branch organiser) for each group
• Marker pens, coloured pencils, sticky notes
• Board/whiteboard and markers for class recording
• Printed picture cards of pond and recirculating system features (filters, pumps, water flow)
• Exit ticket slips (lined and optional sentence starters)
• Timer for transitions
• Visual support cards: “Benefit = helps / Challenge = problem”

Assessment

• Formative: teacher observation during group concept maps, focusing on correct system identification and use of benefit/challenge language.
• Summative (small): exit ticket responses meeting the success criteria (two system types; each has a benefit and a challenge).
• Moderation check: compare class-shared answers against board notes for accuracy.

Differentiation

• Mixed-ability groups: stronger students scaffold peers with prompts and shared decisions in concept mapping.
• Support for students needing structure: provide sentence starters (e.g., “A benefit of pond systems is…” “A challenge is…”).
• Dyslexia-friendly option: offer enlarged print, reduced text density handouts, and teacher read-aloud; allow oral responses that are later scribed by a teacher aide.
• Extension for students ready for more: require an extra link to sustainability (e.g., “Which system may reduce water use and why?”) and encourage precise wording (water quality, reuse, energy use).

Extension (optional)

• Students design a simple aquaponics system model using classroom materials: a small container/bottle, water, a “filter” layer (sand/gravel), and a clear plant/seed setup. Students label how water moves and suggest one benefit and one challenge compared with pond systems and/or recirculating systems. Include a short explanation of how the system could be more sustainable (water reuse, waste conversion), using their concept map vocabulary.