In 2009, Kid Connects at Mental Health Partners sponsored a survey of Boulder County's early care and education providers in order to estimate the prevalence and describe the characteristics of young children in care with challenging behaviors and provider responses to those behaviors. The purpose of the present study, conducted by Kid Connects and sponsored by the Early Childhood Council of Boulder County, is to repeat the 2009 study in order to identify changes in the prevalence of and provider responses to challenging behaviors in the past three years. This follow-up study is the first step in tracking long-term trends relating to Boulder County's children in care with challenging behaviors. A mail and web-based survey was conducted between March and June 2012 of licensed early care and education providers in Boulder County. The response rate was 39.9%. (author abstract)