This is my personal experience in a rural secondary school.
Remove class: My English teacher is a psychiatric patient, he instructed us either to sleep or sit quietly in the class. No English teaching lesson (may be a lesson only!) was conducted for the whole year. He would beat up on our headmaster if he came to lecture him.
Form 1 Class: No English teacher for the whole year.
See, two years are wasted!
Form 2 Class: A non-English teacher was assigned to teach English. I got no idea what I had learned in Form 2 except this one, “You is….”. A Chinese female teacher with good English corrected the mistake for him.
Form 3 Class: A non-English teacher was assigned. Luckily this Industrial Art teacher is quite fluent in English.
Form 4 and 5 Class: I studied in a town school for form 4 and 5. Although a qualified English teacher was assigned, but weak foundation had affected my English learning.