Just a few thoughts, a lot will depend on how much energy you have to spend advocating, and how aggressive you want to be.
Have you researched your district policy re: acceleration? Is there anything in writing. If you haven't already, you have to find this out.
It sounds to me that the super. is making it up at he (she) goes along. I would argue their standard is not evidence based and is arbitrary and capricious and does not provide an appropriate education for your child. Get a copy of a Nation Deceived and the Iowa Acceleration Scale and tell them they need to use research for their decisions (you can of course do this in a nice way). Point out that there are a number of factors that should be looked at in acceleration and scores are just one (using the IAS). Only using one criteria and holding one child back because the parents of others do not request it strikes me as completely irrational.
If necessary, I would argue this to the Board of Education if I had to. Possibly propose an acceleration policy if there is not one (problem with this is it might take longer than just getting accommodations for your child).
Keep us posted.
Today I feel like I have no energy LOL...but I know after some sleep and space from the situation I will feel differently.
I have the IAS, Nation Deceived and tons of other research I gave out at our last meeting(a huge folder that I gave to each person in attendance). Now if they read it or shredded when I walked out, who knows. Our district policy is that there isn't one. It just isn't normally done. Our state policy leaves it to each district to decide. I showed them neighboring districts that do subject/grade acceleration and how they evaluate(b/c it is on the school website...imagine a district that open that the parents actually understand how to help their gifted kids soar). Again, don't know if they used that info as kindling in their evening fire or read it. It is clear at this point it has made zero impact either way.
I am just unsure how it can work next year(differentiation) when it isn't this year. Their argument she was matched up with a teacher not capable of providing her with the best enrichment and that she isn't with any of her high peers. I do think those things do have some part in this, but my concern is if we have a repeat of these problems next year. I am pretty sure the grade/subject acceleration is probably not going to happen, but I want a plan B is this goal plan we will be writing in May...I cannot allow another year like this to happen. It is unfair to my dd and is just a waste of her time on top of her frustration level being so high. I just would be interested in the test results in black and white to make sure they are being 100% honest with us...I just don't trust them.