This article provides results of the effectiveness of a training program for a measure, the Inclusive Classroom Profile (ICP), that is designed to assess the quality of classroom practices that support the individualized needs of the children with disabilities in early childhood inclusive programs. The ICP training program was developed to train users of the ICP to administer the measure with accuracy and reliability. The study assessed the extent to which participants in the training program were able to learn to apply the measure with reliability, as well as the extent to which they found the training and the measure useful for their professional practice. Results indicated that participants of the ICP training successfully met the required reliability standards, rated the components of the training program highly, found the ICP measure easy to use, and continued to use the ICP measure following their participation in the training.