W: (n) engagement [Opposed to: non-engagement] (the act of sharing in the activities of a group) "the teacher tried to increase his students' engagement in class activities"
W: (n) participation [Opposed to: nonparticipation] (the act of sharing in the activities of a group) "the teacher tried to increase his students' engagement in class activities"
W: (n) involvement [Opposed to: non-involvement] (the act of sharing in the activities of a group) "the teacher tried to increase his students' engagement in class activities"