Stock 1983.

Methods	Randomised controlled trial (Allocation by central computer using a stratified random sampling plan).
Participants	16,338 high school students, who applied for driver education in DeKalb County high schools and who said that they wanted to get their license as soon as possible.
Interventions	1. The Safe Performance Curriculum (SPC): 72 hours of formal instruction and testing (n = 5464). 2. The Pre‐Driver Licensing Curriculum (PDL): the minimum training required to pass the driving test, involved 24 hours of formal instruction and testing (n = 5430). 3. Control group: No formal driver education apart from any teaching provided by their parents or by private driver training schools (n = 5444).
Outcomes	The number of students who have been licensed before or within six months of their sixteenth birthday or the course completion date whichever is the later. The number of students who were involved as a driver in one or more accidents.
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Low risk	A ‐ Adequate