Hi, I attained 99 in Combined Science solely through these self made resources of mine. I have painstakingly gathered information from every EDEXCEL specific resource I could lay my hands on (including seneca, pmt, savemyexams, lit every single video on each topic i could find and the EDEXCEL textbook itself) in order to create these incredibly precise documents. They meet every single specification point in meticulous detail including diagrams, practicals in ferocious depth and rigorous explanations addressing each and every concept. These documents are the boiling pots of absolutely every single thing you need to know, nothing more nothing less, to seize your 99 in GCSE Combined Science.