Foxmoth. Agree totally. Although a PPL, my teaching experience was in Driving Instruction [39 years of sitting next to pretty girls.] Parallels can be drawn. It is very much a question of time, pressure with the next student waiting etc. Anybody out there really keen on learning to fly will have the books out, eat, sleep, and breath the subject before and after the lesson. I used to sit in an armchair after my wife had gone to bed, and flew circuits etc. ad nauseam until I had it off pat. This is very easy to do, as is writing down your queries, trying to find the answer in the books, and then tackling someone in the know. Very, very good advice to go to the airfield when flying is not possible. Instructors, driving and flying, teach you to pass exams. Wether or not you progress from that point is ENTIRELY up to your own enthusiasm!!.