This study examined the relationships between instructors and their students, and between students, to determine their roles in building positive relationships and an overall positive classroom environment. Of particular interest was the examination of instructor rapport with students and rapport between students. Students (N = 232) reported on their perceptions of interpersonal relationships in the classroom and on their perceived participation and learning. Results indicate that perceived rapport with instructors and classmates is related to perceptions of classroom connectedness. Instructor rapport, student rapport, and classroom connectedness enhanced student participation. Only instructor rapport consistently predicted participation, affective learning, and cognitive learning. (Contains 4 tables.)