Firstly many apologies if this question is not appropriate for this forum; I am a mathematician and a mathematics education researcher. However, I am posting on this forum because I am doing research into the nature of written mathematics and good a grasp school students have of it. What I am looking to do is compare a sample of students' writing to the standards of professional formal mathematical writing. I was wondering whether anyone can help me identify a linguistic research methodology that accomplish this. I am aware that there indeed a method called the comparative method in linguistics but from what I could see this was to compare two different languages. I was hoping that someone could suggest something (possibly a variant of the comparative method) that I can use.
Many thanks for your help in advance.