My son is 4 almost 5 and this is his first time in a "school" environment. Only 3 months in and they are wanting to switch his teachers in Pre-K. I'm concerned that the teacher is "giving up" on my son. He does have "antsy" pants and he has the selective hearing. He's gone through the normal behaviour issues of all boys and that's cleared up, however, the teacher is frustrated. I've put him on "calm child", however, that made his hyperness worse. So I've cut out sugar, candy and even the red dye stuff trying to get him to be a calm quiet child this and other teachers are expecting. Is this a bad thing?