During the summer and fall of 2003, Education Development Center's Center for Children and Technology (CCT) undertook a formative evaluation of Seeing Reason: Mindful Mapping of Cause & Effect, an Intel Teach to the Future professional development seminar. Intel's seminars are designed to introduce teachers to software tools that they can use to support their students' inquiry and research projects. This formative evaluation examined a pilot test of this professional development format, which specifically focused on the Intel in Education online causal mapping tool Seeing Reason and resources associated with the tool. The goals of this formative evaluation of the Seeing Reason: Mindful Mapping of Cause & Effect seminar were to gain insight into the following: (1) The strengths and weaknesses of this mode of delivery of professional development; (2) The quality and character of the reception of the seminar by both MTs and seminar participants; and (3) Opportunities for, and barriers to impact on teacher practice and student learning for this seminar and possible future seminars. This report presents findings and recommendations based on data collected between August 2003 and January 2004.