8 year old’s assessment from school

My 8 year old’s statement of evaluation from his teacher. We are English skills speakers and he attends a French school far away from the US.

“He is a dynamic student who shows curiosity in his learning. However, difficulties in standing properly in class disrupt his concentration and impact his acquisition of notions. It is important that he makes efforts to adopt a more composed and attentive attitude in order to progress fully.”

Any suggestions and advice would be greatly appreciated.

For more context, he is not on any medication, but I recently introduced Omega-3 and Magnesium supplements. He has also completed a few sessions of occupational therapy, which include aspects of CBT.

Academically, he got a grade B this term. His strenghths are mathematics, sports and arts.