A complete, ready-to-teach lesson for Unit 1 (Principles and Applications of Biology) of the Pearson Level 3 Alternative Academic Qualification (AAQ) in Applied Science: the structure of a water molecule, why it is polar, and how hydrogen bonding gives water the properties that life depends on.

Learning objectives:
• Describe the structure of a water molecule, including its covalent bonds and bond angle.
• Explain why water is a polar molecule.
• Describe how hydrogen bonds form between water molecules.
• Explain how the properties of water arise from hydrogen bonding, and relate each to a function in living things.

What’s included:
• Student worksheet (PDF and editable Word)
• Teacher version with model answers and mark schemes (PDF and editable Word)
• PowerPoint built from the same content as the worksheet, so the board and the sheet always agree
• Diagrams appear twice in the deck: once with numbered markers to question the class on, then again with the answers revealed
• Teacher notes: lesson flow, common misconceptions and a context box
• Retrieval starter (5 marks)
• Structured tasks with key-idea boxes, diagrams and data tables
• Check for Understanding quiz (10 marks) with a confidence self-assessment
• Written-task practice (15 marks) ending with a levels-marked 6-mark question with indicative content

Specification coverage:
• B1 · Water: structure — hydrogen and oxygen atoms, covalent bonding, polarity, hydrogen bonds. Functions — solvent, reaction medium and transport, pH and electrolyte balance, temperature regulation, cohesion–tension in mass flow.

About 60 minutes of teaching; the written-task section works in class or as homework. All questions are original.

Written for the Pearson Level 3 Alternative Academic Qualification in Applied Science, first taught September 2025. Not endorsed by Pearson. Single-school licence.