These are three resources 1 teacher presentation - which I use on whiteboard 2 student copy - which has many gaps to fill in and activities (both in class and homework) which I print as a booklet for students 3 keyword chart the powerpoints are work together and cover chapter 1 of iGCSE edexcel textbook please look at notes section in both powerpoints for tips or confusion links are embedded within powerpoing - ie sometimes in photos so have a good look through teacher version words in yellow are keywords and I have my students fill in keyword chart throughout entire topic of study