Gemma Elizabeth Ashling, 40, died two days after the crash in Boston, Lincolnshire
A dedicated teacher was killed when she smashed into a van while trying to overtake a school bus.
An inquest heard Gemma Elizabeth Ashling had small amounts of cannabis in her system which may have affected her driving.
The 40-year-old, a teacher at Boston High School in Lincolnshire, died two days after the crash, which happened shortly before 4pm on November 26.
Her Hyundai crashed into a Royal Mail van coming in the opposite direction, Lincolnshire Live reports .
Ms Ashling was described immediately after her death as a “dedicated, enthusiastic, kind and a wonderfully warm-hearted teacher, colleague and friend”