Hi all. I am about to embark on the tricky task of teaching my year 11 son, IGCSE Physics and Chemistry as a non specialist. Before the uproar.....this is as a emergency home school measure. It is not a decision taken lightly. I am a very experienced secondary teacher, ( all be it in English / DT!!) and my son is bright and picks up concepts well. He has done well in year 10 but needs to move from B to A grade. Any tips please? ALL HELP GREATLY APPRECIATED!!