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✓ What we like
One of very few schools in Portugal offering the full IB continuum — PYP, MYP and Diploma in unbroken sequence from age 3 to 18
Accepts children from age 1 — nursery from 1 year, full school through to 18
Outstanding variety of after-school activities and summer camps
Summer camps open to non-enrolled children — try before you commit
Well-located between Lisbon, Oeiras and Cascais
Spacious, modern campus — purpose-built and well-equipped compared to many international schools in the Lisbon area
IB Diploma average score 31.7 — 23% of students achieved 35 or above; top score 44 out of 45 — a strong result for a non-selective school
◎ Worth noting
Located in the Taguspark technology park — 20 minutes from central Lisbon, convenient for Oeiras and Cascais but less so for central Lisbon
Popular school — apply well in advance, as places fill up early
School photos
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International Sharing School is one of the very few schools in Portugal offering the full IB continuum — PYP, MYP and Diploma — from age 3 through to 18. Out of more than 60 international schools in Portugal, only three offer this uninterrupted IB pathway. For families planning a long-term stay, that means one school decision, no mid-journey transitions, no curriculum switches.
The campus is spacious and modern — classrooms are large and the facilities feel well-maintained. It sits in the Taguspark technology park in Porto Salvo, just off the A5 motorway, making it easy to reach from Lisbon (around 20 minutes by car), Oeiras, Cascais, and Sintra. The school runs its own bus network covering most of the Lisbon metro area.
The after-school offering is one of the broadest among Lisbon-area international schools — from sailing and horse riding to robotics and graffiti. The school also runs summer camps open to non-enrolled children, which is a practical way to test the environment before committing.
School profile
Founded
2018
Programme
IB
Ages
1–18 years (nursery from age 1 · IB PYP from age 3)
Students
600
Class size
Up to 20 students
School hours
8:30 – 16:00
School bus
✓ Yes
Boarding
No
Programme authorisations
✓ IB World School — PYP✓ IB World School — MYP✓ IB World School — Diploma Programme
Institutional accreditations
◎ CIS Member
Portuguese education licence
✓ DGE authorised (Ministry of Education)
Owner / type
Private · Dukes Education
Academics
Programme
Full IB continuum — PYP · MYP · Diploma
Teaching language
English
Extra languages
Portuguese
IB Diploma avg score
31.7 / 45 — 23% of students scored 35+; top score 44 / 45
3D modelling, Art, Cooking, Business mini games, Graffiti, Photography
Digital / coding
Python coding, Game development, Robotics
Fees · 2026/27
Application fee
€200
Enrollment fee
€1,200
Re-enrollment (annual)
€600
Nursery (1–2 yrs)
€11,790
Kindergarten
€12,720
Grade 1
€15,630
Grade 2
€16,710
Grade 3
€17,070
Grade 4
€18,510
Grade 5
€18,510
Grade 6
€19,410
Grade 7
€20,730
Grade 8
€21,015
Grade 9
€23,040
Grade 10
€23,310
Grade 11
€25,680
Grade 12
€26,760
* Always verify fees directly with the school — they change annually.
Frequently asked questions
Is International Sharing School fully IB?
Yes — it is one of only three international schools in Portugal offering the complete IB continuum: Primary Years Programme (PYP), Middle Years Programme (MYP), and IB Diploma (DP). Most international schools in Portugal offer only the IB Diploma at the senior level.
How far is the school from Lisbon?
The school is located in Porto Salvo, Oeiras — approximately 20 minutes from central Lisbon by car via the A5. It is accessible from Lisbon, Oeiras, Cascais, and Sintra. The school operates its own bus routes covering the main residential areas along the Lisbon–Cascais corridor.
How much does International Sharing School cost per year?
Annual tuition starts at €11,790 for Nursery and rises to €26,760 for Grade 12. There is also a one-time enrollment fee of €1,200 and an annual re-enrollment fee of €600. Always verify current fees directly with the school.
What are the class sizes?
Classes at ISS have a maximum of 20 students per class.
What are the IB Diploma results at ISS?
The school's IB Diploma average score is 31.7 out of 45. 23% of students achieved 35 or above, and the top score was 44 out of 45. For comparison, the global IB average is 30.2.
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