Paraprofessionals need adequate training and supports to assist young children with autism spectrum disorders to engage in appropriate social interactions during small group activities with their peers. In this study, we used in situ coaching and brief post-session feedback to improve the use of environmental arrangement, prompting, and praise by three paraprofessionals working in inclusive classrooms. Results suggested the brief coaching intervention was effective for improving target behaviors. In addition, generalized use of behaviors and child outcomes were positive. In situ feedback is a promising practice for improving use of evidence-based practices by non-certified personnel in early childhood settings.