Are you talking about actual screaming or just shrieking and laughing?
Kids a few doors down have a paddling pool. They are pre-school age and as a consequence have been in there shrieking all day. I'm at home all day. In my garden. I don't really mind listening to them shrieking because you know, they are kids, they are having a good time. It's ear piercing at times but I suspect someone's just chucked cold water over them so you know, meh, live and let live.
My youngest (10) goes out the front with two other 10 year olds, a 9 year old, three 7 year olds, 2 six year olds and one 5 year old. They shout, shriek, laugh, run about, play on scooters, bikes, roller skates. They are out until about 8.30 in the summer, sometimes a bit later.
All of us in this street are parents. Including those who are now considerably older with grandchildren and great grandchildren. We all look out for each other, look out for the kids, elderly neighbours and it's a nice street because we are all tolerant of the fact that living in close proximity to other people can cause problems if you let them.
You are causing such a fuss about having to move your child into another room. It's the summer and guess what? Every time it's warm and light, they will be out there playing. And at some point so will yours. This is life. And when yours is out playing and someone moans that their baby is trying to sleep at 7.30 you may look back and think how much you are overreacting.
And to the teacher who seems to detest children playing on scooters ... are you in the right job??