ACASI	Audio Computer Assisted Self Interviews
FGD	focus group discussion
HIV	human immunodeficiency virus
IDI	in-depth interview
MMAT	mixed-methods appraisal tool
NGO	non-governmental organization
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
RCT	randomized controlled trial
SE	sexuality education
SRH	sexual and reproductive health
STI	sexually transmitted infection
UNESCO	the United Nations Educational, Scientific and Cultural Organization