Inclusion Criteria for students:  age 12 - 17 years the school authority agrees for the student to participate; both parents and students willing to participate.  Exclusion Criteria students:  the school authority refuses for the student to participate; the adolescents attend a specialist and/or independent or private school; the parents of students in a participating school, or the students themselves, have refused to sign the consent document.  Parents/guardians  Parents/guardians are eligible to participate if they meet all the following criteria:  caring for pupils aged 12-17 years; the school authority agrees for the school to participate; willing to participate in the study; willing for pupils they care for to participate in the baseline and post-intervention assessments.  If parents/guardians meet the following exclusion criteria, they are ineligible to participate:  the school authority refuses for the school to participate; the pupils they care for attend a specialist and/or independent or private school; not willing to participate in the study or not willing for the pupils they care for to participate in the baseline and post-intervention assessments.  Inclusion criteria (schools)  the school authority agrees to participate; the schools shall be non-specialist public schools; school contains at least 80 students; school has more than 3 teachers; no more than 60% of students are of either sex; informed consent from parents and students is obtained.  Exclusion criteria (schools)  the school authority refuses to participate; the adolescents attend a specialist and/or independent or private school;  Inclusion criteria (Health Professionals)  Health professionals are eligible to participate if they meet all the following criteria:  Health professionals practicing within selected union councils Willing to participate in the study Exclusion criteria (health professionals)  (1) Health professionals not currently practicing within selected union councils (2) Not willing to participate in the study  Teachers/staff at schools  Teachers and other school staff are eligible to participate if they meet all the following criteria:  working with pupils aged 12-17 years; their school authority agrees for the school to participate; willing to participate in the study;  If teachers and staff at school meet the following exclusion criteria; they are ineligible to participate:  their school authority refuses for the school to participate; not willing to participate in the study