A study examined student mastery of meaning and use in reading and composing of five formal logical connectors (moreover, accordingly, hence, even so, and still) across school level and class type. Subjects were 100 remedial and nonremedial students from a high school, vocational college, and university who were asked to give a synonym for each connector and to generate a compound sentence using the connector. The proportion of synonym and sentence errors according to connector type and student class level was not significant. However, the proportion of total errors made by all class levels and the proportion of unattempted items by connector type and class level were significant. The order of difficulty of the five connector types--from least to most difficult--was (1) "still," and "hence," (2) "even so," (3) "accordingly" and "moreover." Although a developmental trend was indicated for acquiring control, students in general had not mastered the connectors needed for literacy by the time they were in college. (Author/FL)