As others have said, there is too much Fisher family.
I can't take to the Fisher husband, especially as he's in Corrie at the same time, is it necessary to have the entire family at the school.
Plus would a supply teacher really get involved so much in school life? They just handed out pre-prepared worksheets when I was at school.
The gay storyline went too fast. I mean trying to kiss Finn 5 mins into the episode. I can't see what they will do with Josh now.
Grantly is practically an extra so far this series, as are Sam and Amy to some degree. The youngest Kelly hasn't been seen, I'm not sure if the youngest James girl is still in it either.
There's a general lack of teachers. Jonah's dad has been in the opening titles since episode 1 but hasn't really started as a teacher yet.
Plus on a lighter note, it's funny that it is still only ever Tom who breaks up all the fights!