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 In September 1961, the school leased its new premises known as ‘Rippleworth’ at Dharmapala Mawatha. The younger children remained at Fort while the older children, Class 5 and above, moved to Rippleworth. By August of 1963, the lower school at Fort enrolled 100 children and the upper school in Rippleworth had an enrolment of 72 children.
In October 1967, The Overseas Children’s School became a member of the International Schools Association based in Geneva. It was a distinctive honour signifying “schools with the highest professional standards in teaching and education and welcomed pupils of all nationalities”.
Around this time OCS was also recognised by the Office of Overseas Schools, an educational support office within the US Department of State with a mission to support overseas schools serving the US diplomatic and business communities abroad.
By March 1982 the school’s enrolment had grown to 559 students and the International Baccalaureate (IB) DP program was initiated. It was also at this time that the school hired its first guidance counsellor in support of the students and their college admissions. The first IB Diploma was awarded in June 1984.
In October 1982, the campus at Muttiah Road had to move as the landlord wanted to develop the property. This unfortunate incident prompted a very fortunate decision to acquire land in the new administrative capital area of Pelawatte and build its
In September 1961, the school leased its new premises known as ‘Rippleworth’ at Dharmapala Mawatha. The younger children remained at Fort while the older children, Class 5 and above, moved to Rippleworth. By August of 1963, the lower school at Fort enrolled 100 children and the upper school in Rippleworth had an enrolment of 72 children.
In October 1967, The Overseas Children’s School became a member of the International Schools Association based in Geneva. It was a distinctive honour signifying “schools with the highest professional standards in teaching and education and welcomed pupils of all nationalities”.
Around this time OCS was also recognised by the Office of Overseas Schools, an educational support office within the US Department of State with a mission to support overseas schools serving the US diplomatic and business communities abroad.
By March 1982 the school’s enrolment had grown to 559 students and the International Baccalaureate (IB) DP program was initiated. It was also at this time that the school hired its first guidance counsellor in support of the students and their college admissions. The first IB Diploma was awarded in June 1984.
In October 1982, the campus at Muttiah Road had to move as the landlord wanted to develop the property. This unfortunate incident prompted a very fortunate decision to acquire land in the new administrative capital area of Pelawatte and build its  current beautiful facility designed by the renowned Sri Lankan architectural firm of Kahawita de Silva Associates.
The foundation stone for this current site was laid on 9 January 1984. OSC celebrated its 30th anniversary in September1987. In 1992 a new large gymnasium was built and in 1995 a swimming pool.
In 1996 the Overseas Children’s School was formally renamed as the Overseas School of Colombo. In 1998 the IB Middle Years program was initiated, and later on in 2002, the IB Primary Years Program was added, allowing OSC to become an ‘IB World School’ that offers all three IB programs.
In addition, OSC says it is proud to have over 200 years of combined teaching experience. Its long-term faculty and staff are the pillars of the school.
current beautiful facility designed by the renowned Sri Lankan architectural firm of Kahawita de Silva Associates.
The foundation stone for this current site was laid on 9 January 1984. OSC celebrated its 30th anniversary in September1987. In 1992 a new large gymnasium was built and in 1995 a swimming pool.
In 1996 the Overseas Children’s School was formally renamed as the Overseas School of Colombo. In 1998 the IB Middle Years program was initiated, and later on in 2002, the IB Primary Years Program was added, allowing OSC to become an ‘IB World School’ that offers all three IB programs.
In addition, OSC says it is proud to have over 200 years of combined teaching experience. Its long-term faculty and staff are the pillars of the school.