“Kalaitzidis Publications” was founded by mathematician Mr. Theodoros Kalaitzidis, founder and president of the DIAKROTIMA Tutoring Group.

Mr. Kalaitzidis has 30 years of classroom teaching experience, has authored numerous math workbooks for tutoring centers, and for the past 27 years has, among other roles, been in charge of the entire academic team at the DIAKROTIMA tutoring centers. The books published by “Kalaitzidis Publications” represent the culmination of many years of teaching experience and provide significant support to our students as they strive to successfully meet the demands of their courses. Recognizing that the process of acquiring knowledge is ongoing and constantly evolving, our books draw their strength from this very process.

They are constantly reviewed, updated, expanded, and improved to ensure they consistently meet the demanding teaching conditions that prevail in our tutoring centers’ classrooms.

25 authors from all disciplines make up the strongest writing team, presenting 66 titles exclusively for DIAKROTIMA Tutorial Centers. Most of our authors have served as academic directors for many years at the DIAKROTIMA Group’s pilot tutoring centers in Piraeus and Keratsini.

Unlike other books on the market, books published by Kalaitzidis are intended for use in the classroom and are designed to support the educational process in the most up-to-date and effective way, while meeting the needs of the examination system.
Aimed at students and teachers, we aim to provide a valuable tool for organizing thoughts and approaching the methodology of all types of exercises, which will enable students to be thoroughly prepared for success on their exams.

All students at DIAKROTIMA tutoring centers have access to a series of 66 books published by Kalaitzidis Publications and receive their books at no additional cost—FOR FREE!

Specifically, our textbooks cover all core subjects in every grade, while those for tracks B and C tracks are fully tailored to a two-year preparation program designed to ensure success on the national college entrance exams.