My son was just promoted from fourth grade to fifth. It sounds great, but here's the story: He was in the advanced fourth grade math and was bored with that, so after a conference with three of his teachers (math, homeroom and literature) we agreed he would best be helped with an addition of "virtual school" (computer learning at your own pace with a live teacher on the other end) for him alone while in the math class. He had already scored a perfect score in the FCAT math section and was at the top of his class in math. The principal was supposed to enroll him in the virtual school. She did not do so after three weeks. Then another kid was moved into his math class and due to class size requirements someone had to be moved out, so my son was moved to fifth grade math- but it was not a straight swap- it changed 2/3 of his classes to fifth grade classes. He did not like being separated from his friends and this affected him negatively. I asked his teacher to move him back, but it did not seem like it was possible. The fifth grade math was actually behind the forth grade advanced class- they both study the same fifth grade text book, and it appears some other parent complained to get their child into the advanced class and someone had to be moved out. Moving someone out and demoting them would cause parental problems, but moving someone out and promoting (?) them I'm sure seemed like a better move (even though it's not really a promotion). Now in the last week they promoted him to completely fifth grade courses, and his emotional state is worse than ever, and he does not want to go to school at all. He is captain of the chess team and captain of the academic/scholastic games team and clearly one of the most advanced intellectually speaking students in the school. Socially and emotionally he is not ready for fifth grade is my thinking, and his negative reactions and outbursts (crying and not wishing to go to school) support this conclusion. The principal does not wish to change him back- and I'm sure she is caving from pressure by the district on the class size requirement and from the child's parent that was moved into the advanced math class he was taken out of.
Since my wife is a new (interim) teacher at the school I think the principal thinks we "owe" her one, or at least we will not say anything about this for fear of my wife's job. I've expressed my displeasure of my son's "promotion" to his old homeroom teacher via a letter last week and asked for him to be placed back in fourth grade.
The school likes me- I'm president of the chess club, a frequent volunteer and three time career day speaker. Still I'm afraid of the friction I may be causing with my son. I have another son in third grade and the two of them are the strength of the chess club- and our school has placed in the top three in the state with them playing. The academic team just missed first place in the regionals losing to the four time champions.

What should I do? I'm worried about my son not liking school and the long term effects on him. It seems this move has caused one of the top kids in the school to dislike school. Elchivito? Other educators?