The purpose of this study was to investigate changes during teacher training in students' anxiety, attitude, concerns, and confidence about becoming a teacher and the relationships between these changes and selected student characteristics. The subjects were comprised of three groups of students (N-581) at three stages of their teacher preparation: beginning their first required education course, just prior to student teaching, and at the end of student teaching. There were significant changes in anxiety, concern, attitude, and confidence about teaching; however, these changes did not follow a consistent pattern for each measure or for all sample subgroups. Changes in anxiety and confidence about teaching moved in a consistently positive direction; attitude towards teaching showed no overall change; and concerns about teaching increased prior to student teaching but decreased following student teaching. The student characteristics of anticipated grade level of teaching, gender, teaching field, time of decision to become a teacher, and father's educational level were found to be related to one or more of the criterion measures. Four pages of references and data tables are included. (Author)