TSI International School.

What has changed here recently

Samut Prakan is the one province in this guide where the school field is genuinely unstable — a school closed in July 2026, another changed its leaving qualification, a third opened a secondary campus. This section records what a directory listing is most likely to be wrong about.

TSI is mid-rename and mid-accreditation at the same time, which is why directory entries for it are a mess. The school has moved from 'Thai Sikh International School' to 'TSI International School' without completing the change across its own site, and its CIS status appears to have been moving from membership toward full accreditation across 2026. Confirm both the current name and the current CIS status word directly rather than trusting any listing.

Where this school stops

Year 13 (age ~18), with the whole sixth form on this campus.

What a leaver actually holds

The curriculum label and the leaving qualification are different things, and in this province they diverge more than anywhere else covered. For a family that may move country again, this line is the decision.

A Level, or the school's own TSI Diploma.

Where the campus actually is

1799 Thang Rotfai Sai Kao Road, Samrong Nuea, Mueang Samut Prakan, Samut Prakan 10270

This is the transport outlier in Samut Prakan and the reason it deserves its own line. The Bearing campus is at Samrong Nuea, in the corridor served by the BTS Sukhumvit line extension through Samrong and by the MRT Yellow Line, which terminates at Samrong. Every other school in this guide sits in the Bangna-Trad and Suvarnabhumi belt in Bang Phli, where there is no rail at all. We are not publishing a walking time we have not measured — name the station, name the road, and test the journey yourself — but at corridor resolution this is the one school here a family could plausibly reach without a car.

Area guides families use for this school run: Samrong · Bang Na (Samut Prakan side) · Theparak

The curriculum pathway, stage by stage

• Pre-Nursery through Year 6 — Early Years Foundation Stage and English national curriculum primary.
• Years 7 to 9 — Key Stage 3.
• Years 10 to 11 — Cambridge IGCSE, with some AQA GCSE specifications. Panjabi and Hindi are offered at IGCSE, which is unusual in Thailand and a genuine draw for South Asian families.
• Years 12 to 13 — A Level, or the school's own TSI Diploma. Taught on the Samut Prakan campus.

Accreditations & authorisations

Worth separating: an examination-board authorisation (Cambridge, IB, College Board) means a school may enter pupils for those exams. A whole-school accreditation (WASC, CIS, NEASC, Cognia, ISQM) assesses the school itself. A membership is neither. Both matter; they are not the same claim — and in Samut Prakan three of the ten schools publish no accrediting body at all.

• CIS — status word needs checking. The school publishes a Council of International Schools accreditation page, while an independent listing records TSI as a CIS member expecting full accreditation in the first quarter of 2026. Member, candidate and accredited are three different things. Ask the school which it currently holds and when it was granted.
• AUTHORISED — Cambridge International, and AQA for some GCSE specifications.
• No WASC, NEASC, Cognia, Middle States, COBIS or ISQM status is published.

Religious character

Founded in 1985 as a school for Bangkok's Sikh community. Its site is now secular in presentation and publishes no statement of faith or required religious studies, but the heritage remains visible in the curriculum — Panjabi and Hindi are offered at IGCSE — and in the former name families will still meet in directories.

Boarding

None published.

Who it suits

Families who want a British A Level pathway taught entirely on one campus, at a Samrong location genuinely served by rail — which almost nothing else in this province is. Also a specific draw for South Asian families: the IGCSE offer in Panjabi and Hindi is not available elsewhere in the province.

What we could not verify — and where sources disagree

We publish these openly rather than smoothing them over. A school guide that hides its uncertainty is not much use to a family making a decision this big.

• The CIS status word is unresolved between the school's own accreditation page and an independent listing recording it as a member due for full accreditation in early 2026. Accredited and member are not the same claim.
• The rename is incomplete across the school's own site, so searches on either name return partial results.
• The school's footer describes it as an international school 'in Bangkok'. Its entire secondary school and sixth form — Years 7 to 13 — are in Mueang Samut Prakan.
• The group's second campus, at Wongwianyai in Bangkok, is primary only. If you are enrolling a secondary student, only the Bearing campus applies.
• Name collision: TSI and TSIS are different schools, both in Samut Prakan, roughly 7 km apart, with similar acronyms and overlapping curricula. Directory entries for the two are easy to confuse and appear to have been confused. Check the domain and the street address before you contact either.
• Roll size is not published; the school states 'over 30 nationalities' and 'small class sizes' with no numbers.

Ask every Samut Prakan school this

• Is this school still operating, under this name, this year? Samut Prakan is the one province in this guide where a school on families' shortlists closed — VERSO ceased operations on 31 July 2026 — and directories still list it as enrolling. Check the school's own homepage for a closure or rebranding notice before you do anything else.
• What qualification does a Grade 12 or Year 13 leaver actually hold? Not the curriculum label — the qualification. Raffles moved from Advanced Placement to the IB Diploma without the directories noticing, TCIS displays an IB logo while holding only candidate status, and D-PREP names no leaving qualification at all.
• Where does this school stop? SISB Suvarnabhumi ends at Primary 6 and awards nothing, despite being marketed across the Bang Kaeo property corridor as an international school.
• Is the school ACCREDITED, or AUTHORISED, or a MEMBER? Ask for the body, the status word and the expiry date. Three of the ten schools here name no accrediting body at all, one is disputed between WASC and NEASC, and one is somewhere between CIS membership and CIS accreditation.
• If boarding matters, is it a boarding house on this campus? SISB's boarding is real but sits at a different campus in Bangkok, and Concordian's residency programme cannot be confirmed as currently operating. ASB Green Valley and Wycombe Abbey are the ones publishing houses on site.
• Which province is the campus actually in, and which campus am I contacting? Almost every school here markets itself as Bangkok. Several groups run a Bangkok campus and a Samut Prakan campus under one brand with different provision — ASB, SISB, TSI and D-PREP all do.
• How long is the drive at 7am, from the address you are actually considering? The school belt spans kilometre 7 to kilometre 15 on Bangna-Trad plus a separate Samrong cluster. Those are not interchangeable at rush hour.
• Does the school publish a bus route that reaches you — or only a catchment claim? Only D-PREP publishes actual routes. Everyone else has a bus with no published coverage, which cannot be planned around.

Sources & References

• Ministry of Education, Thailand

Primary and official sources are cited above. Government rules, fees and procedures in Thailand change over time and vary by office; always confirm current requirements with the relevant authority before relying on them. BAANLYY never takes paid placement in editorial content.