Educators, docents, and interpreters are considered integral to the learning experiences at many museums. Although there is growing recognition that these staff members need professional development to effectively support visitor learning, there has been little research to describe their work or identify effective facilitation strategies. To address this need, we explored the nature of unstructured staff-facilitated family learning at the Oregon Museum of Science and Industry in Portland, OR, videotaping and inductively analyzing 65 unstructured staff-family interactions. The analysis