This publication provides an introduction to teaching and learning approaches for the extension topics within GCSE Physics. It highlights some specific ideas that teachers can adopt and where to find further information. It also outlines issues for managing the change. This guide contains sevens sections: Section 1 presents the policy context; Section 2 describes this publication; Section 3 outlines how Science, Additional Science and Extension Science (Physics) are structured, and Annex 1 compares the physics content for each specification, outlining what is required for Science, Additional Science and Extension Science; Section 4 outlines effective teaching and learning approaches relevant to the extension topics in GCSE Physics; Section 5 provides specific ideas for teaching and learning the key topics in the extension specifications; Section 6 outlines issues to consider when implementing GCSE Physics in a science department, such as staffing, continuing professional development, health and safety, and resource requirements; and Section 7 lists resources and organizations from where further information can be obtained. Annexes include: (1) GCSE Physics specifications at a glance; (2) Teaching and learning models: bibliography and further reading; (3) Assessment of How Science Works in different GCSE Science courses; (4) LSN science publications; and (5) Triple Science Support Programme frequently asked questions. (Contains 13 figures and 1 table.)