Philippa has 15 years' experience teaching secondary science and is now a science tutor on the PGCE course at the University of Oxford. Philippa also has experience examining for OCR and KS3 SATs, and is an experienced science textbook author for KS3, GCSE and IGCSE. She has an honours degree in Chemistry, Resources and the Environment from York University, an MEd degree from Bristol University and a PGCE from the University of Oxford. Jo Locke has 11 years' experience teaching secondary science,working on KS3 through to A-level and with experience as a Head of Science. She is an experienced examiner, and has previously examined for International Baccalaureate and Edexcel A-levels. Jo is an author, and has written material for GCSE, BTEC, Entry Level Certificate and A-levels. Jo has an honours degree in Biology and a PGCE from the University of Bath. Helen Reynolds is an Institute of Physics Teaching and Learning Coach, and a former Head of Science. She is an experienced secondary science teacher, and has a MA in Physics and a PGCE from the University of Oxford. Helen's authoring experience includes recent student and teacher materials for Cambridge Secondary 1. Dr Andrew Chandler-Grevatt has a PhD in school assessment, and a real passion forscience teaching and learning. Having worked as a science teacher for ten years, of which five were spent as an AST, Andy has a real understanding of the pressures and joys of teaching in the classroom. Alongside his national and international research in school assessment, Andy is a teaching fellow on the PGCE course at the University of Sussex, and is a successful published assessment author.