| 1960 |
- Founded by Mrs. Nelson Doig from the United Kingdom. Known as the Tenby School – after a seaside resort of Tenby in South Wales
- Based in the Church Hall of the Presbyterian Church at Jalan Kelab Golf
- Started with two classes of international children from Ipoh
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| 1966 |
- Parents and representatives of British companies raised funds and purchased Tenby from Mrs. Nelson Doig
- First Principal, Mrs. Philips was appointed in 1966 and retired in April 1967
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| 1967 |
- Mrs. Day was appointed Principal from April 1967 to March 1968
- She was succeeded by Mrs. Audrey Fong from March 1968 to 1996
- School relocated to Tiger Lane by taking over Rawley’s Kindergarten
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| 1974 |
- School moved to Jalan Brash and then back to Presbyterian Church Hall
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| 1993 |
- School temporarily closed in October 1993
- School reopened as Tenby International School and Kindergarten under Fine Spectrum Sdn. Bhd. at Jalan Watson
- The enrolment was 160 children from 17 different nationalities under Mrs. Audrey Fong as Principal
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| 1996 |
- Mrs. Audrey Fong retired and was succeeded by Tuan Haji Mubin bin Harun
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| 1997 |
- Mrs. Jill Lawrence became Principal
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2000 - 2002 |
- Mrs. Vicki Yin took over the Principalship and the school was renamed Ipoh International School (IIS) with 350 students in 19 classes from 22 different nationalities
- The first class of Tahun 1 of the KBSR section commenced in January 2000. First batch of Year 11 students sat for the IGCSE examinations in May 2002
- First musical production was held in July 2002
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| 2003 |
- The school area was increased to include an adjoining piece of land at Jalan Kelab Golf
- Mrs. Vicki Yin resigned in July 2003 and Mr. Alan Roderick took over as the Principal
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| 2004 |
- Aesthetic Capital Sdn. Bhd. (now known as Tenby Educare Sdn. Bhd.) took over the school
- The school enrolment grew to 480 students from 29 different nationalities and a staff of 50
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| 2005 |
- Mrs. Lai Kong Wa joined as a Director and COO of the company
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| 2006 |
- The first batch of KBSM students came into Form 1, 2 and 4 in January 2006 with Mr. Louis Rozario as the Principal of the new Malaysian Private School wing, Sekolah Menengah Tenby. Mrs. Sivaprasanna Chandra was appointed the Principal of SR Tenby. This marks the separation of schools under the company into Tenby Kindergarten, Ipoh International School (IIS) and Sekolah Tenby with different leaders heading each school.
- Mr. Roderick resigned and Mrs. Agalya Balaguru took over as Acting Principal (2006) and subsequently Principal (2007), of IIS
- IIS was awarded candidacy status by the Western Association of Schools and Colleges (WASC) – self-study process began
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| 2009 |
- IIS is awarded a three-year accreditation by the Western Association of Schools and Colleges (WASC)
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