How to Address the time-out corner and negative feedback on my son's work with his teacher? 1st grade

Last year was a very rough year for my son. We've been spending all summer really focusing on the positive and getting him built up for school, working on building his resilience, and after a great first 2 days I was hoping we had made it off on a very positive fresh start to the new year.​He is in a bilingual program, so one of his teachers is still the same one he had last year--this is important for context.​Today he told me that he was sent to sit in the corner (he couldn't remember why when I asked him), and on a separate occasion, his teacher told him that his work was "Early Years Level" (ie, the quality that she would expect from a preschooler).​So he was basically distraught.​The thing is, I don't want to be a helicopter mom and I know my son needs to be resilient. HOWEVER, I've been working my goddamned ass off to get this kid motivated to go to school and I feel like in one fell swoop this lady just killed it. I'm pissed because she knows what we have been through last year and I just feel that this approach is NOT HELPFUL.​Due to his issues last year, we got him fully evaluated using in-depth cognitive testing by a PhD in child psychology: he is Gifted and has ADHD. Hence, he has trouble staying on task, doesn't like sitting at a desk for a long time, and takes some time translating instructions into meaningful action. We have been working with a psychologist for 2 years, but last year was a very focused effort to build his skills for school. His teachers know this.​So I'm kind of like.....WHAT THE FUCK. Who says that to a kid? Who says that? Seriously. I know teachers say this shit, I work in a classroom setting as well, but it's just not an appropriate feedback method. Do I jump to his rescue? Like seriously wtf do I do because I am so upset.​My son has attention issues, but he is not non-functional. He is a bright, engaged, friendly boy with skills and abilities to function in the classroom setting. HOWEVER, he needs support rather than punishment when it comes to certain behaviors. My once-eager child now hates school and has terrible self-esteem...we have told his teachers about this.​I am just beside myself. How can I phrase this in a way that gets my point across without seeming like a helicopter mom that's going to criticize every little thing his teacher does that I don't like? HALP via /r/Parenting https://ift.tt/2LOyktY