I believe it should strictly be the parents choice. the school can make a recommendation and back up their reasons for doing so, but the final choice should be the mother and fathers. Why should a school dictate what your children experience in life? they are responsible for teaching and providing a safe and loving environment. not depriving a child from experiencing life with their twin.
I personally would choose to keep my twins together if i had twins. here is why. Twins are born together. they have the exact same life experiences for the first few years. some children may use a blanket or stuffed animal for security while most twins use each-other. they expect life to go along with the other. splitting them up can cause emotional damage. they may become distracted because they miss their sibling rather than focused because they are alone. there is just a unique bond between twins. they depend on each-other and they are connect in a way no other siblings are. they grow together from the time they are tiny eggs until they are adults. it can also be more simple for parents to actively participate in school. rather than having 2 different assignments mom or dad can help both of them at once. they can also learn to help each-other when they are learning the same things at once.
in some instances this option is not possible. if one twin has a learning disability and the other doesn't, it would be harmful for you to force the other one to slow down or vise vera speed up. quality of education is the most important. if there were no aids available to help out then they would have to be separate. i would also say that if there are behavioral issues which become worse when the other twin is present they should be separate. if they are not causing problems, there's no need to separate them. the only time i see this fit is if keeping them together may harm one or both.
however, in the end i feel it should be up to the parents. they're their children and who knows them better than their parents?
Check out this site. its a video on NECN. The woman in the video is a professor at Salem State. she had a bill passed for allowing parents to decide what happens to their twins.
http://www.necn.com/Boston/Health/Parents-fight-to-allow-twins-in-the-same-classroom/1221517325.html