Using nationally representative data from the spring 2017 round of the Head Start Family and Child Experiences Survey 2014-2018 (FACES 2014), we examine the PD experiences of Head Start staff (see the text box on page 2 for definitions of the staff we discuss in this brief). We first describe the landscape of PD for a variety of staff in Head Start, including comparisons between program and center directors. We then address two specific types of PD that support classroom quality improvements: (1) coaching and (2) assessment and curriculum supports (Egert et al. 2018; Harding et al. 2019 a; Kraft et al. 2018; Weiland et al. 2018). We also examine whether selected PD supports vary by program agency type, program size, teacher experience, and teacher education. (author abstract)