This is a complete, zero-prep practical investigation designed to explore the factors affecting the speed of water waves. It is fully adaptable for Key Stage 3 (KS3) through to A-Level Physics, providing exceptional value across your entire curriculum. Crucially, no expensive ripple tank is required—it uses only standard, cheap classroom equipment, making it perfect for non-specialists and limited budgets. KS3 / GCSE: Focuses on core skills: measuring, calculating speed, plotting non-linear graphs, and investigating the relationship between speed and depth. A-Level: A rigorous investigation into the power law. Students practice linearisation using logarithms to determine the experimental constants. High Safety, Low Risk: Safety notes are included. Comprehensive Teacher Support: Includes detailed notes on safety, setup, theoretical background, teaching notes, suggested stretch and challenge activities, and student sheets. At SimpliPhy we aim to make teaching science simple. We specialise in supporting non-specialists