About Us


The history of the remarkable institution commences in 1989, when the owners of the premises Mr. & Mrs. Mangala Wijekularatne faced with a number of entrepreneurial options to inaugurate a visible / solid business, finally resolved on a social service enterprise to establish a Montessori house of children to cater to the over whelming needs of the fastest developing suburb of Colombo South.

The founder Directress Mrs. G. R. Wijekularatne AMI (St. Bridget’s) Dip (Open Uni) AMS_ (USA) was a highly qualified preschool educational specialist, who introduced the methodology of undiluted, exhaustive and well researched. Montessori system of education. Through absolute strain, perseverance and dedication, the fledgling institution developed at a rapid place. The parents witnessed the steady progress, efficiency – persuaded and motivated the management to inaugurate the primary grades. There after process continued imperceptibly on a planned basis where one higher grade was added per academic year without resorting to indiscriminate placement.

The strenuous and uncontaminated process was completed in 2002, when the college presented students for public examinations.

In 2001 Mrs. Wijekularatne migrated to the USA, where she established 3 Montessori institutions.

In 2003 faced with acute space problems, the management purchased the large building opposite the Montessori house to accommodate the college section.

In 2005, a basketball court of International standard was constructed in the new premises. In 2010, an ultra modern air conditioned auditorium comprising technologically advanced and sophisticated equipment with a large stage was completed with spectacular state of the art accessories.


College Arms


College Song

Let's sing and praise together

Our Alma Master

As we are the Sons and Daughters of

C.S.I. College

She makes our future bright and right

We'll be good as shining lights

So we may bear her name in society.

Let's sing and praise together

Our Alma Master

As we are the Sons and Daughters of

C.S.I. College

We learn to share with love and care

She fills us with qualities rare

So we may bear her name in society

Let's sing and praise together

Our Alma Master

As we are the Sons and Daughters of

C.S.I. College


House System


Mr.Mangala Wijekularatne


Mr.Suraweera (Principal)

Mr.K V Richmond Suraweera

Vice Principal

I am proud to say our school has been serving the students of our country for 27 consecutive years commencing from September 1989. Colombo South International College Kalubowila is one of the leading international school in the region. Initiated with a pupil enrollment of 4 children and 2 teachers. Due to dedication, devotedness, commitment, perseverance and hard work of our Director Mr.Mangala Wijekularatne and his beloved wife Mrs. Wijekularatne and the staff the college made a remarkable progress and tremendous growth within a span of 27 years with thousand students and the staff exceeding over 85 teachers. Our curriculum is based on the British and local students of Education to prepare students to sit for London (O/L) and (A/L) person Edexcel Examinations and Local (O/L) and (A/L) examinations. Students have performed very well in all these examinations over the years.
The school going many achievements of excellence both in the academic and non academic extracurricular and co- curricular fields
Perseverance dedication and commitment of the teachers and all other staff were the key factors that crossed an unblemished and prestigious record of excellence in academic, sports and community leadership. This enabled the college to produce highly innovative and patriotic individuals to our mother land.
            “Education is helping the child to realize his potentialities”
                                                            -Erich Fromm

We strive to achieve our objectives through dedication, perseverance and commitment.
(Vice Principal)

Sports Master


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5834, West Oakey Bivd,
Las Vegas, NV.,89146 U.S.A

Happy Day Montessory Academy
Las Verdes,Las Vegas, NV.,
89146 U.S.A

SunRise Montessori Academy
5355, West Oakey Blvd, Las Vegas,
89146 U.S.A

Get in Touch

  • Phone:
    (+94)112 827 821 / 112 822 469
  • Email:
  • Address:College
    43, S. De. S. Jayasinghe Road
    Kohuwala, Nugegoda
    Sri Lanka

Get in Touch

  • Address:Montessori
    01, Anderson Road
    Kalubowila, Dehiwala
    Sri Lanka
  • Address:Delkanda
    605, High Level Road
    Delkanda, Nugehoda
    Sri Lanka