This study is a cluster-randomized trial design. The target population will be high school children from standard 8 to 10 of the age group 13-15 years. It is a parallel-group comparative trial with two arms having 1:1 distribution- group A and B with oral health curriculum intervention from Dental Professional and School teacher respectively. CBSE English medium high schools of Ernakulam district, Kerala is selected as clusters for the trial. Minimum cluster size is 20 students per school. The selected schools are randomized using lottery method. Total sample size is 2000 high school children. Data will be collected at baseline, after 1 year (mid-term) and 2 years (final) respectively. The outcome measures are DMFT (Decayed, Missing and Filled Teeth index), OHI-S (Oral Hygiene Index-Simplified, and KAB (Knowledge, Attitude & Behaviour). Data collection will be done by clinical oral examination and KAB questionnaire.

School oral health education programme delivered through an oral health curriculum intervention with oral hygiene instructions and demonstrations for oral health promotion will be implemented to the school children for a period of two years. One session will be conducted every four months. Curriculum will be divided into modules with age-appropriate instructions for the students. Lesson plans with instructor instructions, hands-on demonstrations, hand-outs or master copies for each child will be included in each module. The curriculum will include oral health topics.

We will measure the change in index scores (DMFT, OHI-S) and difference in knowledge, attitudes, and behaviours regarding oral hygiene post-intervention, i.e., after incorporation of oral health curriculum from the dental professional and schoolteacher. We will also compare and calculate the difference in effectiveness of the intervention between the dental professional and the school teacher.