Which subjects are most accessed by students?
Good Question! As of yet, the Socratic platform does not aggregate statistics like that.
You might get a quick idea just by looking at the number of questions posted in some areas in just one or two days.
After a "Trial Period", if a topic seems to be getting sufficient activity it is promoted to a "regular" category. Thereafter I do not see the usage numbers posted anywhere. The data must be in the system, but so far it has not been a priority to organize it into usage reports.