I am doing my research on the area of motivation and twice-exceptional students. It will be based at a middle school with a 2e program. I was thinking about the Academic Amotivation Inventory (AAI), but I can't find it. Please give links.
You could look at the student motivation scale by Martin (2001). Here is the full citation.
Martin, A. J. (2001). The student motivation scale: A tool for measuring and enhancing motivation. Journal of Psychologists and Counsellors in Schools, 11, 1–20. https://doi.org/10.1017/S1037291100004301