This study examined whether training would increase the level of confidence of school administrators in selected teacher evaluation components;A cross section of Iowa's administrators and supervisory personnel, both in terms of level of experience and geographical location, were represented. The sixty-four participants included 12 superintendents, 13 secondary principals, 18 elementary principals, 18 supervisory personnel and 3 college professors representing 11 females and 53 males;A pretest/posttest design was used. The data were collected using the Teacher Performance Rating Scale and the Supervisory Attitude Survey. Statistical treatment of the data was completed using the Statistical Package for the Social Sciences (Norvsis, 1983) computer program. Descriptive statistics were computed to study the relative value of study variables. Frequencies and paired t-tests were used to assess the mean differences between the pre- and posttest confidence ratings;Results indicated that the participants became significantly more confident as teacher evaluators and trainers of teacher evaluators in the eight selected components after training. The descriptive data also indicated that the training increased interrater reliability of the evaluators.