I suppose it is quite competitive to get a place in one of the choice schools. Unless she is absolutely sure of getting a place in the school of her choice, I would say: What/Which middle school does she plan to go to?
Yes. She was not sure at all. Here we have more than 100 middle schools here. However, there are seven middle schools are "the best" schools.
Much appreciated. It should be "She will be a middle school student".
How does taking tests help you choose a school?
Do you mean she was taking entrance exams to see if she would be accepted by the best middle schools?
Yes. Those best middle schools will test students' abilities to answer questions on paper and choose the best students for interview. Unluckily, the person who I asked today she failed the test to go to the best schools but still go to some "okay" middle schools.
Given the context, I think "Which middle school does she hope to go to?" is not okay here. How about my new try:
Which offer of middle school did she finally get?
This sounds pretty weird but it's a better way to ask the question. Please enlighten me.