Livres par David Ballard

David Ballard is a former Head of Chemistry with many years experience of teaching in secondary and further education in England. He is an experienced examiner and is currently Chief Examiner for A level Chemistry for a leading awarding body and is also a Principal Examiner in GCE Applied Science for another awarding body. Rhodri Thomas is currently deputy head of Ysgol Uwchradd Aberteifi. He has many years' experience in teaching Chemistry in schools and universities in the UK and overseas. He is an experienced examiner and is currently a Principal Examiner for A Level Chemistry for a major awarding body.