ISE vs Regents.

Five questions.
Five answers.

1. Do you want IB Diploma on American AERO/NGSS — or British IGCSE with A-Level fallback?

Both schools deliver IB Diploma at Sixth Form. The fork is foundation and optionality. ISE runs American AERO + NGSS from primary, with an American high-school diploma and an IB Diploma route at G11–12; it does not publish British IGCSE or A-Level. The current sources cited on this page do not establish a scheduled MAP, PSAT or SAT programme, a university-application platform service or transfer-credit arrangements. Regents runs British EYFS through IGCSE, then publishes IB Diploma and A-Level routes on the same campus. Ask both schools for the current subjects, prerequisites, counselling and testing support for the intended cohort.

2. Do you need boarding on the Pattaya side of Chonburi?

If boarding is required, Regents is the option in this pairing. It boards from Year 3 at ฿447,000 standard, or ฿424,650 with its 5% annual-payment option, plus a ฿30,000 retainer. ISE is a day school.

3. Sriracha commute or Pattaya-side Pong — where does your family live?

ISE is inside Burapha Golf Club at 282 Moo 5, Bowin, Sriracha; Regents is in Pong, Banglamung. The addresses create different routes, but neither supports a universal minute estimate or winner. Test both from the real home during school traffic and request current pickup, ride and late-activity timings.

4. Can you budget ISE tuition-only vs Regents premium band?

On standard 2026/27 tuition, ISE is lower at every displayed peer: ฿357,600 Pre-K versus Regents ฿464,000 Pre-Nursery; ฿514,200 K–G5 versus ฿649,000 Years 1–2; and ฿646,000 G11–12 versus ฿899,000 Years 12–13. Both publish full-payment discounts, so compare the same basis and then add excluded services.

5. WASC small-school US track — or Nord Anglia network at scale?

ISE holds WASC accreditation since 1999 and publishes a student-to-teacher ratio below 8:1, while current enrolment is not published. Its current cited source set does not establish a scheduled SAT or TOEFL programme or transfer-credit arrangements, so request those details in writing if they matter. Regents sits inside Nord Anglia Education — about 90 schools across 37 countries, with MIT for STEM and Juilliard for performing arts partnerships and an IB World School record dating to 2002. Regents does not currently publish a campus-specific CIS claim; its Education Development Trust and ONESQA accreditation statements are school-published claims. Families considering a later transfer should ask either school for the current transfer and placement policy rather than assuming network or transcript portability.

Summary verdict

• Choose ISE if: American AERO/NGSS with American high-school diploma and IB Diploma routes fits your plan; WASC accreditation and the published ratio below 8:1 matter after you verify the actual class; the Bowin route works from your address; lower published tuition at every peer band matters; and admissions confirms the intended senior subjects, counselling and testing support in writing.
• Choose Regents if: you need boarding from Year 3 on the Pattaya side; you want IB Diploma or A-Level as a real choice at 16; British IGCSE foundation through Sixth Form fits your credentials plan; Nord Anglia global platform and its IB World School record matter; premium campus scale justifies ฿854K at Sixth Form; and the Pong commute works for your family.

Neither fits — if…

You want American/IB versus lower-fee British A-Level in Nongprue — see ISE vs MIS. You want IB Diploma without Nord Anglia pricing — see Garden vs Regents or St Andrew's vs Regents. You want pure British A-Level without IB — see Rugby vs Regents. You want Rayong British+IB vs American+IB — see Garden vs ISE.

Compare the same payment basis

Start with standard 2026/27 tuition for the child’s exact stage. ISE’s published range is ฿357,600–฿646,000; Regents’ standard range is ฿464,000–฿899,000. Regents’ separately published 5% full-year-payment figures run ฿440,800–฿854,050, while ISE also publishes a full-payment discount. Keep both discounts on their own lines with the qualifying date, cash-flow requirement and refund conditions. A discounted figure at one school should not be compared with standard tuition at the other.

Then build first-year and later-year columns. At ISE, include application, enrolment, refundable security deposit, lunch, bus, uniform, IB examinations and any assessed EAL charge. At Regents, include application, age-band enrolment, experiential fee, meals, transport, projected examinations, any EAL or personalised support, and boarding plus its retainer where relevant. Mark each item mandatory, optional, refundable, annual, termly or one-time. An unpublished price remains quote-required, not zero.

Price optionality only if the child can use it

ISE offers an American high-school diploma alongside the IB Diploma route. Regents offers IB Diploma or A-Level after its British and IGCSE foundation. Ask each school for the current senior subject list, prerequisites, timetable blocks, minimum cohort rules, counselling sequence and examination charges. Optionality is valuable when the pupil’s intended subjects actually run and their prior study supports entry; a pair of programme logos is not enough.

For a younger pupil, ask how present teaching builds toward those senior choices without letting a distant qualification outweigh classroom fit. Visit the proposed year group, compare teacher feedback and independent work, and ask how English-language or learning support appears in an ordinary lesson. Request the assessed service and price in writing if either school recommends support.

Boarding and scale need their own test

Regents publishes boarding from Year 3; ISE is day-only. A boarding family should request the current handbook, included nights, weekend and holiday routine, prep supervision, medical care, guardianship, device rules and additional charges. Visit the relevant boarding house during a normal week. A day family should not pay conceptual value for boarding it will never use, but may still value the larger peer group and activity structure that accompany Regents’ scale.

At ISE, ask for the actual class and graduating-cohort size rather than treating the published student-to-teacher ratio as proof of every group’s size. Small-school familiarity can be a strength, but subject choice, activity depth and peer dynamics depend on the relevant cohort. Compare the product this child will enter, not a general description of “small” or “large.”

Finish with the real weekly routine

Run both commutes during school traffic and obtain exact bus quotes to the home address. Record pickup time, ride duration and late-activity returns. The final decision should combine the child-specific class, complete invoice, usable qualification route, boarding or day routine and weekly travel. That evidence explains whether ISE’s American/IB day-school model or Regents’ British dual-pathway scale is the better fit.