Experienced IGCSE GCSE and ALEVEL Chemistry teacher

I am currently an experienced and currently working qualified teacher of Chemistry to A-level and IGCSE Chemistry. I have been teaching in the english system for around 18 years. I also teach KS3 Science in the school I work in. I am a previous head of Chemistry in a large secondary school in the UK. I have a Masters in Environmental Chemistry and a degree in Marine Chemistry. I have been working as an examiner for Pearson Edexcel for around 10 years which has given me an excellent in-site into what examiners want from responses. I have also previously examined for Cambridge exam board.