The bus crashed about 3 p.m. Wednesday at Gainsborough Road and Tuckerman Lane in Potomac, a Montgomery County Fire and Rescue spokesman said.
The students are between the ages of 12 and 13, Fire and Rescue spokesman Pete Piringer said. They attend St. Andrew's Episcopal School. The crash site is about three blocks from the school.
The students were taken back to the school to be evaluated for injuries, Piringer said, and the severity of the injuries is unknown. The children are expected to be sent to three area hospitals.
The cause of the accident is being investigated, Piringer said.