I completed my PhD in the US, and I am currently writing a grant application for a EU grant. While I was a graduate student, I worked on a grant that had me in a middle school classroom (8th grade, so 12-13 year old students).
What is the best, short way to describe this in my grant proposal? I don't want to waste a lot of space describing the specific age range of the students, if it can be avoided. At the same time, I don't know if it will be clear what I mean if I write "8th grade classroom" or "middle school classroom". Any ideas?