As a facilitator of the Incredible Years for Teachers Programme (IYT), I have found that the classroom management strategies participant teachers learned during the 6-month programme period have not been embedded and sustained in their use through time. This inquiry investigated the benefits and barriers to IYT being spontaneously, consistently and continuously used, embedded and sustained in classroom practice. Sixteen teachers who had completed the IYT programme participated in an online survey and two of these participated in a follow-up interview. Thirteen participants reported that they found workshop attendance to be beneficial and 92% stated they were confident in using the strategies. However, the survey results showed that most used only some of the strategies in their classroom practice and that there was a decline in their use through time. Potential barriers to use related to a lack of support once the workshops had been completed. The results suggest that teachers would benefit from continued support from their IYT facilitators after the programme has been completed. Implications of the inquiry findings for teachers, IYT facilitators and policy makers are discussed.