My son is struggling at school

My son 7 year old just started the second grade. He’s a young second grader, meaning he actually turned seven a week after school started.

Ever since the first day he’s had points taken away for not doing his work quickly and getting up from his seat or speaking before raising his hand.

He’s had to say after school every week for points being taken away in a row and the teacher has now asked me twice if he has a behavior disorder.

Here’s the thing: he’s never had these issues before at school. He’s always been a good student and strives to do well. That being said he does have a lot of energy.

At home I’ve spoken to him about the rules at school and how he needs to follow them. There have been consequences and discussions about his responsibilities at school.

I’m at a point where I’m wondering if it’s also an issue with the teacher since he has not had any of these issues outside of school or with any of his previous teachers.

I’m at a loss as what to do and I see my son having three points taken away and getting defeated feeling like he can’t do anything right at school.

Has anyone had anything similar? I sent a message to the principal and also screen shot what his teacher sent me.