The study was conducted to assess the effect of planned teaching on knowledge of school teachers regarding selected health problems among school children in selected schools of suburban area in Mumbai. An pre-experimental evaluative approach with one group pre-test post-test design was used in the study. The sample consisted of 50 school teachers who are teaching to students of 1st standard to 7th standard in selected schools of suburban area in Mumbai.non probability convenience sampling technique was used in this study. The self structured questionnaire technique was used to assess the knowledge of school teachers. The result revealed that 50 per cent samples belonged to the age group of 21-30 years, Majority of the subjects were females (68%),48.00% are diploma in education (D.Ed.),86.00% samples have less than 5 years experience, (86%) had conducted health check up programme in schools and 78.00% of the subjects participated in health programme conducted in schools. The finding showed that in pre test scores near about half of samples were having average knowledge and others half were having good knowledge. But after planned teaching 12.00% of subjects had good knowledge and 88.00% of subjects had very good knowledge.

Keywords: Planned teaching; Health problems; School children; School teachers.