The need for effective continuing professional development (CPD) in music education is outlined and literature on CPD for generalist teachers and teaching assistants is reviewed. A small qualitative study is then presented that took advantage of a music-making project led by folk musicians in six special schools in England. This study focused on the generalist teaching staff who actively supported their pupils to participate. The staff reported that their own confidence in working musically had increased, as had their awareness of the importance of music for children. It is suggested that these outcomes were achieved through incidental CPD, potentially paving the way for further, deliberate CPD.