Videos can be a very effective way of modeling how science activities can be done with students.
In recent years, a variety of videos have been published that can be used to complement and extend the reange of what can be presented and developed in professional development workshops. We introduce the types of videos available and how to use them. We also include a description of videos relevant to middle school reform. This article follows the careers of two middle school science teachers, both of whom have been identified as leaders in large urban school districts. Their stories echo those of others who are serious about reforming science education but must daily address the contradictions and challenges of systems larger than themselves or their classrooms.