It is not uncommon for your child to hate at least one of their lessons or one of their teachers. Children generally hate the lesson because they feel they are not very good at it and they don't like the teacher because they feel they are being picked on (they may well be told off often for not paying attention or misbehaving) I see lots of children who express that their teacher has it in for them.
Why? Because they are misbehaving.
Why? Because they have no interest in the lesson
So what do they do? They talk, they are silly etc
They end up on report or in detention regularly and they and their parents want it to stop.
One way I get them to re-focus and be interested is by asking them what do they want to do with their life? What is their end goal? If that's their goal what do they have to do to reach it? Yes they need qualifications and that means they need to listen and pay attention in class.
It works every time. How do you as a parent get your child to concentrate and be interested in the classroom?