Typically, this is how a day pans out...
Arrive at school around 8.50. By around 10.30, they have a break. By 12.30, it's lunchtime for approx 1 hour. They finish around 3.30. So never more than a couple of hours between toilet/food/drink.
Here's how the day actually pans out....
Miss, I need a drink, Miss I need the toilet...Cue half a dozen other children now decide they need the toilet or a drink.
Breaktime...Children are reminded to go to the toilet, grab their snack and drink and then go outside. Break times is over, I guarantee at least 2 or 3 children need the toilet because they 'forgot' to go at breaktime.
Lesson starts. Miss can I have a drink? 3 or 4 other children now decide they want a drink. They have a sip then stand and chat and have to be told to sit down.
Lunchtime, same. They eat, they drink, they 'may' go to the toilet, they go outside. Afternoon lessons start and the same thing happens. Miss, I need a drink. Miss, I need the toilet.
Behaviour is another issue. Teacher says 'If you're going to sit and play with your bottle, then put it on the side.' Child says to mom 'She wouldn't let me have a drink.' They're hardly going to say 'I was being a pain in the ass, clunking my bottle on the table, suckling, whatever so my teacher said I couldn't have my bottle on the table.' They won't admit to being naughty.
Children play up then go home and say 'My teacher shouted at me today.' Mom complains. Teacher asks 'Why did you tell your mom that this happened? That's not true.' It's not unreasonable to challenge a child about going home and telling lies about what really happened. If the teacher isn't going to correct them, and the parent isn't going to correct them, then who is?
Children have a loose relationship with the truth. It's a fact. They either blatantly lie, or they interpret things in a different way. But they are not always truthful or factual. Especially if they think a) Mom will protect them regardless or b) they're going to be told off.
Don't complain. There's more to this. Saying your child is fidgety isnt a reasonable excuse. The other 29 children in the class are equally important and deserve their education.