Level of education specified when registering for an edX user account‘p’: Doctorate‘m’: Master’s or professional degree‘b’: Bachelor’s degree‘a’: Associate degree‘hs’: Secondary/high school‘jhs’: Junior secondary/junior high/middle school‘el’: Elementary/primary school ‘none’: No formal education‘other’: Other education(blank): User did not specify level of education ‘p_se’: Doctorate in science or engineering (no longer used)‘p_oth’: Doctorate in another field (no longer used)NULL: This student signed up before this information was collected