Calvijn Buitenoord Barendrecht

What Calvijn Buitenoord Barendrecht does

Portus Scholengroep is a Dutch Christian secondary education organization operating six schools across Rotterdam-Zuid, Barendrecht, and Ridderkerk in the Netherlands. The group was formed in 2021 by consolidating the former CSG Calvijn schools (including what was previously known as Calvijn Buitenoord Barendrecht, now Portus Groene Hart) with Farelcollege Ridderkerk, with educational roots tracing back to 1920 and 1929. Portus operates four core schools (Meridiem, Farelcollege, Groene Hart, and Juliana) plus two partnership schools (Focus Beroepsacademie and Máximacollege), offering secondary education at all levels from vmbo-basis to vwo (atheneum) including bilingual streams, a homework-free vmbo model, and a personal-coach learning model.

The organization is owned by the Vereniging voor Christelijk Onderwijs in Rotterdam en omgeving (VCORE), a Christian education nonprofit foundation, and is funded primarily through Dutch government subsidies for public secondary education. Beyond traditional schooling, Portus runs De Binnenhaven, a facility supporting homebound students and those at risk of dropping out, and hosts the Basisvaardigheden.nu collaborative platform for teacher knowledge-sharing on basic skills. Its distribution model relies on the OverstapRoute primary-to-secondary transition system, open days, and dedicated Instagram channels per school.

Portus has invested in a human-centered AI initiative aligned with its 2025-2028 strategic direction, including the Begr(AI)p project with NOLAI and Nestas for AI-supported reading comprehension and deployment of third-party tools such as ChatGPT and Diffit. The group maintains a strategic partnership with Opleidingsschool Rotterdam for teacher-training pipelines drawing from HR, ICLON, and TU Delft.

Name

Calvijn Buitenoord Barendrecht

Legal name

Portus Scholengroep

Website

https://calvijn.nl

Company type

Private

Founded year

2021

Operating status

Operating

Headcount range

1–10 employees

Short description

Portus Scholengroep is a Dutch Christian secondary education group operating six schools across Rotterdam-Zuid, Barendrecht, and Ridderkerk. The not-for-profit organization, formed in 2021, serves students aged 12-18 from vmbo-basis to vwo and is funded primarily by Dutch government subsidies.

Ownership category

akta.pro rank

Headquarters

HQ city

Rotterdam

HQ country

Netherlands

HQ region

Europe

Offices5 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Secondary Education Services: Public secondary education services funded by government subsidies. Schools provide education at all levels from vmbo-basis to vwo (atheneum).

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Calvijn Buitenoord Barendrecht is the predecessor designation of what is now Portus Groene Hart, a secondary school in Barendrecht (Netherlands) that is part of Portus Scholengroep. Portus Scholengroep is a Dutch secondary education school group offering education at all levels from vmbo-basis to vwo (atheneum) across schools in Rotterdam-Zuid, Barendrecht and Ridderkerk, supplemented by support services for at-risk students and an AI-enhanced learning program.

Product overview

Portus Scholengroep is a Dutch secondary education school group formed in 2021, comprising six schools: four main schools (Portus Meridiem, Portus Farelcollege, Portus Groene Hart, and Portus Juliana) and two partnership schools (Focus Beroepsacademie and Máximacollege). The schools are located in Rotterdam-Zuid, Barendrecht, and Ridderkerk, offering education at all levels from vmbo-basis to vwo (atheneum). Beyond traditional schooling, the group operates educational support services including De Binnenhaven (for at-risk students) and the Basisvaardigheden platform (for basic skills development). The organization has developed a human-centered AI initiative focused on responsible AI integration in education, aligned with six guiding principles that prioritize educational value over technology for its own sake.

Differentiator

Problem solved

Functional benefit

Products and services

• Portus Groene Hart
• Portus Meridiem
• Portus Farelcollege
• Portus Juliana
• De Binnenhaven

Quantifiable outcome

• 95% of teachers indicate reading comprehension is a skill many students struggle with and needs extra attention
• +3 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability4 records

Feature2 records

Partnerships

Four partnerships are on record, tiered core and minor.

• Opleidingsschool RotterdamcoreStrategic or Co-development PartnerPortus Scholengroep is affiliated with Opleidingsschool Rotterdam, which intensively collaborates with teacher training programs in the region and other school groups. Student teachers from HR, ICLON, and TU Delft are placed through this partnership.
• Opleidingsschool RotterdamcoreStrategic or Co-development PartnerStudent teachers from Opleidingsschool Rotterdam are placed at Portus schools. Students from HR, ICLON, or TU Delft who are part of Opleidingsschool Rotterdam are placed through this organization.
• KoersVOcoreStrategic or Co-development PartnerKoersVO is the cooperative association for which De Binnenhaven provides educational services for students aged 12-18 with internalizing problems.
• EnverminorStrategic or Co-development PartnerEnver provides group training in collaboration with De Binnenhaven for students receiving support at the facility.

Scale indicators4 records

Recent moves7 records

Expansion highlights4 records

Broad incumbents

• Stichting Carmelcollege: One of the largest Catholic secondary school groups in the Netherlands with broad multi-track offerings. Comparable in faith-based identity, multi-track curriculum, and foundation-owned governance, though operating at significantly larger scale.
• SALTO (Stichting Algemeen Lerarengroep en Toezichthouders Onderwijs): Amsterdam-based secondary education school group with multi-track offerings. Comparable in foundation-owned governance, multi-campus operation, and full-spectrum secondary curriculum delivery.
• Stichting Lucas Onderwijs: Large Dutch foundation managing multiple primary and secondary schools. Comparable in foundation-owned, multi-campus governance and Randstad geographic focus.

Direct peers

• Wolfert van Borselen: Rotterdam-area secondary school offering bilingual vwo and havo programs. Comparable in Rotterdam catchment and bilingual education offering similar to Portus Farelcollege.
• Het Stedelijk Lyceum: Rotterdam-based secondary school offering vmbo through vwo tracks. Comparable geographic market and educational level mix to Portus's Rotterdam-Zuid schools.
• Caland Lyceum: Rotterdam secondary school offering havo, vwo, and bilingual streams. Comparable in Rotterdam catchment, upper-secondary focus, and bilingual education positioning.
• LMC Voortgezet Onderwijs: Rotterdam-based secondary education school group offering vocational tracks (vmbo) and similar lower-secondary programs. Highly comparable to Portus in geography, student level, and Dutch public-funding model.
• Dunamare Onderwijs Groep: Dutch secondary school group with multiple campuses in the Randstad region. Comparable in multi-school foundation-owned structure, broad curriculum, and innovation focus.
• OSG Rotterdam: Public secondary school group operating in the greater Rotterdam area with multi-track offerings including vmbo, havo, and vwo. Directly comparable in catchment, funding model, and student demographic.

Regional players

• Maris College: Secondary school group in The Hague region offering vmbo through vwo tracks. Comparable in multi-school foundation structure and full-track offerings, though operating in an adjacent South Holland geography.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• Instagraminstagram.com/portus_meridiem
• LinkedInlinkedin.com/company/calvijn-buitenoord-barendrecht

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries7 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Calvijn Buitenoord Barendrecht