Teaching by Design

Dia Gerontoudi Prep Center is the only boutique prep center in Greece.

We offer physical and online preparation for GMAT / GRE / TOEFL / IELTS / SAT / LNAT / LSAT (lessons and courses) and we also provide admissions consulting , for the selection of the appropriate university, for the preparation of CVs, and statements, with the aim of admission to higher education institutions. Thus, we help applicants get into the world’s most prestigiousand competitive undergraduate and graduate programs.

We believe we can make the difference in our students’ lives. This was also our first thought for the creation of a postgraduate preparation center, and not just another language school. We are able to both mentor them and provide them with the required guidance (from university selection to the time of final application), and then watch them proudly, achieve their professional and academic goals. Our promise is to ensure quality training, continuous improvement, and absolute dedication to helping our students achieve their objectives.

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What makes us special?


Who we are?

At Dia Gerontoudi Prep Center, we can offer you a unique blend of academic and professional/corporate experience of more than 35 years. So, we can pass on this invaluable knowledge acquired during all these years and assist you to succeed in all your academic and career goals. Further, while studying at our center, you can enjoy high-quality editing services from the sole member of AIGAC (certified by the stamp of excellence) in the Greek market, and one of few in the European one, thus support that is critical for your admission in Ivy League universities around the world. Our center has established strong partnerships with well-known universities such as INSEAD and HEC Paris and our team members constantly participate in conferences concerning test prep (such as GMAC Test prep summits) and admission (AIGAC annual conferences) to offer you the opportunity to be always updated. Last, we can assist you identify tens of scholarships and network you with our students in more than 230 universities globally.

What we do?

Dia Gerontoudi Prep Center offers high-quality boutique services in both group classes and tailored one-to-one courses. Thus, we can support you holistically in all the indispensable prep stages, starting from consulting on the university choice, test prep, editing, and interview prep. By following this procedure, our team can help you to enter the top university of your choice, efficiently and effectively. Further, in the frame of CSR, our center supports and sponsors student organizations and events, to inform them of their potential targets early.

How we work?

At Dia Gerontoudi Prep Center, we are interested in real knowledge, thus the students to learn from original material, being an outcome of multi-year preparation and tons of effort. We use the most updated technology and tools that are available in the market while teaching or offering simulations. Also, we have created inspiring and luminous spaces, according to the best global standards. All these, along with the patented teaching techniques and the electronic materials result in not only the best quality of preparation but also environmental protection.

In Dia Gerontoudi Prep Center «We teach by design» and «We go green»!

In the middle of difficulty lies opportunity.

Albert Einstein

Meet our team

Dia Gerontoudi
Director of Studies, Expert Verbal Instructor
BA in English Literature, Deree College, MA in Comparative Literature, University of Warwick
  • Expert instructor for the verbal portion of GMAT / GRE / TOEFL / IELTS / SAT / LSAT examinations for more than 35 years, in classroom courses, and private lessons
  • Custom-designed techniques for optimum test performance
  • Expert knowledge of post graduate programs
  • Expert knowledge of requirements for Admissions Consulting
  • E-learning via Zoom tutorials
Konstantinos Karalis
Expert Quant Instructor
Diploma in Chemical Engineering, NTUA and BSc in Economics, NKUA
  • Over 35 year teaching experience, including GRE and GMAT instruction
  • Published extensive body of work on the development of analytical mathematical thinking and methodologies of problem solving in calculus, number theory, geometry, probabilities and complex numbers
Thomas Kalandranis
Academic Admissions Consultant
MBA Seattle University, AIGAC Board Member (Association of International Graduate Admissions Consultants)

  • Professional consulting and coaching of application essays, personal statements (SoPs), CVs, and Theses
  • Customized personal interview coaching, techniques for profile enhancement
  • Hundreds of successes in top postgraduate programs in Europe and USA
  • Over 23-year international managerial experience in corporate environments, in Europe, US, and Latin America
  • Expert LNAT/LSAT instruction for admission into law schools in USA and UK
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Stefania Mitrokotsa
Expert Quant Instructor
BSc. Physics NKUA, MSc in Astrophysics NKUA, PhD Candidate in Astrophysics NKUA
  • Expert in teaching GMAT, SAT Quant
  • Experienced instructor IB Physics
  • Presented posters and papers in congresses of the Hellenic Astrophysics Society
Vally Karampakaki
IT and Marketing Manager, Admissions Coordination, GMAT Consultant
BSc in Accounting and Finance, Deree College, MSc in Digital Education Management, GBSB, DMI Certified

IT and Digital Marketing Manager, Admissions Coordinator , GMAT Consultant

  • Website Design and Maintenance
  • Digital Advertising
  • Fairs Organization
  • Sponsorships Management
  • Project Management
  • Creation of Digital Course Materials
Valentine Karamanoli
Office Coordinator
BA Photograpy, Middlesex University, Diploma in Digital Marketing, ALBA

Office Coordinator

  • Appointments and Calls management
  • Lab Reviews
  • Materials Formatting for Simulation Lab
  • Communication Between Management and Professors
  • Data Entry
  • Photo Materials for Website and Social Media, Graduate Expos Participation

Our Center

Partnerships - Sponsorships