She has been praised by police after grabbing the steering wheel and driving her family including her little sister to safety when her mother had a seizure in the driver's seat.
The fourth-grader was traveling down a curvy road in Bay City, Michigan, with her younger sibling and mother, Samantha Jones, last September when the seizure began.
Jacey, who was in the back seat of her family's Hyundai, climbed into the front and took hold of the wheel as her mother fell unconsious. She then drove the little distance left to her school's parking lot.
Upon getting there, she drove the car around in circles until she attracted the attention of a passing parent. The adult then opened the vehicle's door and put it in park, before lifting the girls out and calling 911.
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Jacey, who is the the eldest of four sisters, has been handed a Distinguished Citizens Award by Michigan state police for her actions, which Mrs Jones said likely saved her and her young daughters' lives.