International Sharing School Taguspark Review — ISS Lisbon — International Sharing School Lisbon Review

Real fees, IB results, facilities and parent experience at ISS Taguspark / International Sharing School Lisbon, Portugal

This is a former parent review of International Sharing School Taguspark, also known as ISS Taguspark, ISS Lisbon or International Sharing School Lisbon, Portugal. It covers the areas families usually want to understand before enrolling: real fees, IB results, teaching quality, teacher turnover, facilities, admissions practices and the gap between school marketing and daily reality. I am writing this for parents who are still researching ISS Taguspark or ISS Lisbon and comparing international schools in Lisbon before making a decision.

How ISS Taguspark / International Sharing School is structured

Understanding ISS Taguspark (International Sharing School) requires understanding what it actually is: a for-profit asset within the Sharing Education Group, managed by a group of brothers with no disclosed professional background in education, with UK-based education group Dukes Education as a shareholder

The conflict of interest embedded in this structure is not subtle. One of the brothers serves simultaneously as Head of Admissions at the school — the person deciding which families enroll — and as Head of Investor Relations for the Sharing Education Fund, a vehicle that raises capital from outside investors using the school’s enrollment figures as part of its pitch. The same person is responsible for selling school places to families and selling equity stakes to investors, including Golden Visa-related investment interest. The incentive in both cases is identical: maximize revenue.

Another brother holds the role of CFO — ensuring that the financial architecture of the group is managed by the family itself.

A third brother is presented in official communications as head of the Madeira School. He is, in practice, based in Lisbon, Oeiras.

None of this is hidden. It is publicly documented or directly observable. A school that has a family-run CFO but no dedicated Director of Educational Programs tells you precisely what is being managed here — and what is not.

A note on ownership: the group sold a stake in ISS Taguspark to Dukes Education. One of the most visible changes can be seen on weekday mornings in the Sharing School car park. Members of the family now arrive in Porsches and wear luxury watches, including Rolexes. In the same car park, some of the teachers who actually run the school every day arrive in far more modest cars — or do not own a car at all. Given the salary levels repeatedly described by teachers, the contrast is difficult to ignore. It is not subtle.

The entry of Dukes Education into the school’s ownership structure has not softened the financial focus — if anything, it has sharpened it. Families considering any school that operates under a similar investment model, in this region or elsewhere, would do well to ask the same questions.

ISS Taguspark IB results: the number missing from the brochure

ISS Taguspark markets itself aggressively as an IB school. It does not publicly publish its IB results. This is itself informative. Schools proud of their academic outcomes publish them. The absence of published data at a school where IB branding is central to the marketing proposition is not an oversight — it is a decision. From what parents have been able to piece together through their networks across the Lisbon international school community, ISS results are among the weakest in the region. The school’s reluctance to publish them suggests it reaches the same conclusion.

What happened around the IB reauthorization visit is also worth noting. A significant number of teachers were dismissed in the period immediately following that visit. The staffing levels presented to IB evaluators and the staffing levels sustained in everyday operation were not the same.

Teaching quality and teacher turnover at ISS Lisbon

Teachers at ISS Taguspark are very badly paid — a figure they discuss openly and with frustration. This does not reflect what comparable international schools in the Lisbon area offer, and the gap is well known internally. The result is a permanent retention problem the school has never resolved.

The picture from inside the school is not limited to what parents observe. On Glassdoor, where current and former employees leave anonymous reviews, the pattern is consistent across multiple contributors spanning 2023 to 2025. A former coordinator described management as focused exclusively on financial returns rather than student outcomes, and listed poor compensation, disregard for staff, and poor working conditions as defining features of the workplace. A former employee noted that the school is family-owned and run by people too inexperienced to lead an educational institution. Even a longer-serving current teacher — someone who recommends the school — flagged management inconsistency, a lack of transparency, and almost no coordination between year levels as significant problems. Across nearly all reviews, the same phrase recurs in different forms: the colleagues are good. Everything else is the problem.

In June 2025, the consequences became impossible to ignore. The school’s Head of Primary resigned — not to leave education, but to found a competing school. That decision, made by someone who had seen the institution from the inside, speaks for itself. The school subsequently announced that an Australian educator would be joining as Head of PYP. He never arrived.

ISS Taguspark facilities: promises, classrooms and building issues

For years, families have been told that proper new facilities are coming. They have not come. The communication cycle is consistent: an announcement, a timeline, a reset, a new announcement.

In the MYP building, a parking area was converted into classrooms. Some of these rooms have no exterior windows. Children rotate through them, but the rotation means the problem is distributed, not solved — every student spends part of their school day in a space that was designed to store cars with no natural light and inadequate thermal insulation.

The building logic extends further. Several areas operate as open-plan spaces where multiple classes run simultaneously in a room built for one. The noise levels and lack of boundaries make sustained concentration difficult. These are not design choices made with pedagogy in mind.

Building maintenance at ISS tells the same story. Recurring water leaks have been reported across both buildings — not as isolated incidents, but as an ongoing condition. This is what systematic underinvestment in a physical environment looks like over time.

ISS Taguspark fees : the hidden cost of enrollment at Sharing School

The headline tuition figure is not what you will actually pay. Once enrolled, families discover a set of additional charges that are non-negotiable and largely undisclosed at the point of sale.

The school canteen costs €2,100 per year — and it is mandatory. Families have no opt-out. Run the numbers: across approximately 180 school days, that is roughly €12 per meal, per child, with no alternative. You pay whether your child eats the food or not.

Then there is the annual re-enrollment fee: €600, charged every year, to families already enrolled. Not a one-time administrative cost. A recurring annual charge for the privilege of staying at a school you are already paying full tuition to attend. There is no meaningful service attached to it.

Add to that the examination fees - 900€ in MYP and 950€ in DP, charged separately for both MYP and DP assessments — and the true annual cost of attending ISS Taguspark diverges significantly from what is presented during the admissions process.

These charges surface once you are already committed. For a school that invests heavily in its admissions experience, the timing is not accidental.

What students watch on school devices

Students using school devices are exposed to YouTube advertisements. The school does not pay for a YouTube subscription to remove them. At the fees charged to families, this is not a financial constraint. It is a choice.

ISS Taguspark, Lisbon admissions: the open-door policy

ISS Taguspark openly presents itself as a non-selective school. This is framed as a progressive, inclusive value. In practice, it functions as a business decision.

The result is that the school admits children regardless of their academic level, their existing support needs, or their English proficiency — including students entering MYP with no working knowledge of English, the language in which the entire programme is delivered. A non-selective policy in a well-resourced school with strong support structures can work. Here, where learning support is thin and staffing is stretched, it means that children who need significant additional help are enrolled, fees are collected, and the gap between what those children need and what the school can actually provide is left for families to discover later.

Families report being able to enroll mid-year, or even for a single term. This is not standard practice at serious international schools, where admissions processes exist partly to assess fit and manage cohort stability. Here, the process is optimized for one outcome: getting families in and fees collected. The door is wide open. The question worth asking is why.

Student turnover at ISS Taguspark

Student turnover is high at ISS. The families who leave are not generally leaving due to relocation. Many leave at the end of the school year specifically to enroll in schools with stronger academic reputations and more consistent delivery. Sharing School replaces them with new families who have not yet experienced the gap between the marketing and the reality. The cycle repeats, year after year.

Marketing is where the real investment goes

ISS Taguspark is genuinely excellent at one thing: presentation. The website, the social media, the admissions process — all of it is polished, professional, and well-resourced. The contrast with what happens inside the buildings is sharp. This is not accidental. It is a deliberate allocation of resources toward acquisition and away from delivery.

When you encounter a school this good at its own marketing, the appropriate response is not to be reassured. It is to look harder at what the marketing is compensating for.

What I would tell families who are still deciding

Ask for Sharing School’s IB results for the last three years — and note carefully if they are not provided. Ask for the full fee schedule, including canteen, re-enrollment, and examination fees, before signing anything. Ask who holds the role of Educational Program Director. Ask about teacher turnover. Ask about the state of the buildings. Look up the school on Glassdoor before you sign. Talk to current parents privately, away from school events and away from anyone in an admissions role.

A pattern beyond Lisbon

The issues described here do not appear to be specific to this campus. ISS Madeira, another school operating under the same Sharing Education Group, has been the subject of a detailed account by a parent that documents strikingly similar concerns — governance by a board without educational backgrounds, a gap between marketing and reality, broken facility promises, and a culture where financial priorities consistently override educational ones. The full account is available here: https://nrpro.medium.com/international-sharing-school-iss-madeira-when-business-models-meet-education-4308fdbe12dc

When the same patterns appear independently across different campuses, in different cities, reported by different families and staff — it stops being a coincidence. It is the system working exactly as designed.

My kids left the school in June 2025. We should have left sooner. I am writing this now because I remain in contact with families who are still there for the 2025–2026 school year — and many of them will leave at the end of this year. According to several families still enrolled, things have not improved; in some respects, they appear to have worsened. The issues described in this article are not historical. They are ongoing.

FAQ about ISS Taguspark / International Sharing School Lisbon

Is ISS Taguspark the same as International Sharing School Taguspark?

Yes. International Sharing School Taguspark recently announced a transition to the name International Sharing School Lisbon. It is the same school, same location, same ownership. Parents searching for ISS Lisbon, ISS Taguspark, or International Sharing School Lisbon are researching the same institution.

Where is ISS Lisbon located?

International Sharing School Lisbon is located in the Taguspark / Oeiras area, near Lisbon, Portugal.

Does ISS Taguspark publish its IB results?

At the time of writing, I have not found detailed public IB results published by ISS Taguspark. Parents should ask the school directly for the last three years of IB results before enrolling.

What extra fees should parents ask about at ISS Taguspark?

Parents should ask about tuition fees, canteen fees, annual re-enrollment fees, examination fees and any mandatory additional charges before signing an enrollment contract.

What should parents check before choosing ISS Lisbon?

Parents should ask for academic results, staff turnover information, learning support capacity, facility details, full fees and independent feedback from current and former families.

Useful links for parents researching International Sharing School Lisbon

For transparency, parents can verify public information about ISS Taguspark / International Sharing School Taguspark through the links below:

• Official ISS Taguspark website — official website of International Sharing School — Taguspark, presented as an IB World School in Lisbon.

• ISS Taguspark school documents — official school documents, including policies, handbooks, calendars and parent information.

• ISS Lisbon school documents — official school documents under the new branding.

• Dukes Education — International Sharing School — Dukes Education’s official page for International Sharing School.

• International Sharing School employee reviews on Glassdoor — anonymous employee reviews and company profile. These should be read as third-party feedback, not official school information.