This paper describes a 30-year individual transition from traditional
lecturing to more interactive undergraduate teaching. The advent of re
quired evaluations by students in the late 1970s spurred efforts to be
more responsive to students' questions and then to stimulate more que
stions and participation by students, and eventually led to giving for
mal credit for class participation. Small-group discussions (collabora
tive learning groups), simulation games, neighbor talk, and split-clas
s debates were added later. Improved learning and use of student names
, and the ''muddiest point'' technique, have been added more recently,
as have extensive small-group class presentations. In the course on d
eviant groups, regular lectures are no longer given. Secret ballot eva
luations by students have confirmed the value of these changes, most o
f which resulted from conversations with colleagues. Small-group discu
ssions and group presentations to the class seem most valuable as gene
ral interactive substitutes for lecturing.