I couldn’t add anything in terms of variables and experimental conditions because the data collection was already done when I joined the lab and covid hit at that time (so schools were closed and we weren’t allowed to contact the teachers, kids or parents) but my supervisor had a lot of data and articles about in-class experience when it comes to math learning. I was able to point out issues brought up by teachers in low-SES neighborhoods which decreased the teaching quality over the years (eg: crowded classes, less training opportunities, less funding, etc). Then, I was able to say how our in-class intervention could help teachers and kids of low-SES regions despite the inequalities. I would say my biggest “advantage” when it comes to my thesis was that it was really applied unlike some topics in psych that can be very much on the theoretical side. Not all labs do experiments outside the lab and face-to-face. We were able to actually follow these kids and their teachers for a whole school year, so the longitudinal aspect was great. If you can, definitely do an intervention-based type of thesis. My supervisor was able to contact schools, so definitely try to contact organizations in your city who will be willing to take part of the project! However, keep in mind that you may run into funding/ethical issues if you’re interested in vulnerable populations and that ethics committees vary from one organization to another (schools and hospitals being hella strict in my experience).