The purpose of this formative evaluation was to investigate the experiences of preservice teachers utilizing performance support system (PSS) technology to develop knowledge related to classroom technology integration. A PSS provides end users just-in-time support to perform various tasks. Because teachers have time constraints, a PSS can be used to support them with classroom technology integration. Both quantitative and qualitative data were used to answer the research questions. Qualitative data included focus group interviews and a perception questionnaire; these data were used to identify factors related to the participant' experiences. In addition, a pre- and post-knowledge test was administered to the preservice teachers ("n" = 28) to study potential learning impact of a PSS for technology integration. Results showed that, although their learning improvement was not statistically significant, the participants reacted to PSS use positively, with caution. Based on the results, it is recommended that the PSS environment should be updated based on the feedback from the participants, and additional long-term studies should be conducted to validate the current findings. (Contains 2 tables and 1 figure.)