Lesson Plan

• Describe the key natural and human factors that affect water supply.
• Explain how population, economic activity and technology shape water demand.
• Analyse the three dimensions of water security and evaluate management strategies.

• Projector or interactive whiteboard
• PowerPoint/Google Slides with water‑balance diagram
• Handout summarising supply, demand and security factors
• World water‑use data sheet (sector percentages)
• Sticky notes or index cards for group brainstorming
• Exit‑ticket slips

Begin with a striking image of a dried riverbed to highlight water scarcity. Ask students to recall recent local water‑related news and link it to the concept of water as a limited resource. Outline today’s success criteria: identify supply and demand drivers, describe water security dimensions, and suggest one management response.

1. Do‑now (5'): Students list three ways they use water daily; share and categorize as supply‑ or demand‑related.
2. Mini‑lecture (10'): Present supply factors using the slide and quick Q&A.
3. Group activity (12'): In fours, analyse a case study (e.g., irrigation in a semi‑arid basin) and map supply‑demand interactions on a poster.
4. Whole‑class debrief (8'): Groups report findings; teacher highlights key points and introduces water security dimensions.
5. Interactive modelling (10'): Demonstrate the water‑balance equation; students calculate ΔS for a simple catch‑ment using provided data.
6. Management strategies brainstorm (8'): Students generate IWRM‑type solutions on sticky notes; categorize as supply‑side, demand‑side, or security measures.
7. Check for understanding (5'): Quick poll (show of hands) on which factor they think is most critical in their local context.

Recap the three pillars—supply, demand, security—and how they interlink in sustainable water management. Students complete an exit ticket stating one actionable step their community could take to improve water security. Assign homework: research a local water‑related issue and prepare a brief paragraph proposing an IWRM‑based solution.