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 yearsexperience 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 andEdexcel 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,