The Iowa Acceleration scale is an excellent tool for helping to make that decision. The questionaire takes ALL things into consideration besides just test scores and grades. it will look at social, emotional, outside of school involvement, siblings, etc. and really gives you a good idea as to what the best option is. While no book can predict the actual outcome, the is a tremendous amount of research regarding the positive benefits to it. Another thing the Iowa acceleration scale weighs heavily is if the child is accepting of the idea. if there is any way you can ask your child ahead of time, you really need to know her thoughts on it. Some kids are absolutley against it. the IAS pretty much says if the kids doesn't want it, consider other options.