Since its development in the 1970s, researchers, evaluators, and change facilitators have been using the Stages of Concern (SoC) Questionnaire to assess teacher concerns about new programs and practices. This update of the 1978 SoC manual explains how to use and score the SoC Questionnaire. There are digital files associated with this product, including a MS Word version of the questionnaire and scoring sheets, as well as a scoring program in MS Excel and SAS formats. The files can be downloaded after purchase using a product code found in the print materials.