Mr. Kathiresan's inspiration to start Ritham Special School for the Mentally Challenged came inadvertently from David, an intellectually challenged child, who had excellent memory but very poor associative skills. Being a former govt school headmaster in Tamil Nadu and having won the Best Teacher award from both the Central and State governments, Mr. Kathiresan was touched by his interaction with David and decided to start a school for children like him.
The school follows the BASIC - MR scale (Behavioural Assessment Scale for Indian Children - Mentally Retarded) to assess each student individually and fix their syllabus accordingly. Students' progress is evaluated on a quarterly basis, following which their syllabus is re-fixed. The teacher-student ratio in the school is 1: 8.
The total number of students in the school is 100, out of which 73 students come from underprivileged backgrounds and require financial assistance. Children who stay far away and cannot afford the transportation cost are given free transportation facility as well.