no the teachers shouldnt be sacked, did the people requiring seats ask the teachers or just ask the children? that isnt very clear?
where there no other people who could have given up their seats? tbh on the tube i would rather that kids of 6-10yrs were sitting down, well at least all the 6-8yrs olds, i was in london last week with my 4yr old and 18mth old and ended up standing having to hold the toddler and hold ds4, it is quite hard to stay stood balanced, my 4yr old didnt manage it without help, the tube can be quite jerky so i think young children are better off sat down. mind you if i was in that situation and i was standing and my kids were sitting i would happily tell my kids to sit on the floor so that those more in need could have their seats and yes the floor is dirty but my kids and their clothes can be washed! and at least then they wouldnt be trying to balance and risk falling over.
were all the carriages full?