http://ies.ed.gov/ncee/edlabs/regions/northeast/pdf/REL_2017201.pdf

Heather J. Lavigne. Karen Shakman. Jacqueline Zweig. Sara L. Greller. Education Development Center, Inc.

This study describes how principals reported spending their time and what professional development they reported participating in, based on data collected through the Schools and Staffing Survey by the National Center for Education Statistics during the 2011/12 school year.