IRCT2014062618248N1.

Methods	Randomised controlled trial; 2‐stage sampling method (clinical examination and questionnaire‐based)
Participants	2nd grade high school students who voluntarily participated in the study
Interventions	Educational intervention was designed based on the data collected from pre‐test and carried out in 5 50‐minute to 60‐minute sessions within 4 weeks
Outcomes	Main outcomes: dental plaque and oral health behaviour Other outcomes: toothbrushing
Notes	Author contacted for further information: no response so unable to clarify further