Methods	Randomised controlled trial
Participants	1607 ninth grade school students 41.4% Male, 60.2% White
Location	North Carolina, US
Interventions	Early College High School targets students underrepresented in college (i.e., low income, the first in their family to go to college or members of a minority group). It is a personalised programme designed to boost the academic progress of students, minimising barriers between high school and college.
Program deliverers	Teachers, school staff.
Evaluator role	Independent
Outcomes	Course taking patterns and success Suspension Absences Planning to attend four‐year college Algebra I College prep. maths courses English
Length	Not clearly stated
Assessment	Baseline and post treatment. Unclear how many months or years after intervention.
Attrition	4.8%
COI statement	Not presented
CoFI	Unlikely.