CELT Tutors

Marisa Constantinides – Centre Director & Owner –  CELTA & Delta Tutor 

Marisa is a teacher, teacher educator,  and ELT author; she is the Director of Studies of CELT Athens responsible for the design and implementation of all courses offered at CELT.

Her main ELT qualifications are a Diploma in TEFLA (the RSA Dip. TEFLA,  predecessor to the Cambridge Delta)  and an M.A. in Applied Linguistics from Reading University.

Marisa is a frequent conference presenter and keynote speaker – some recent presentations can be viewed here – and has presented at IATEFL International, TESOL France, Brazil TESOL, TESOL Greece as well as on numerous online Conferences and Events and has served as a member of the Committee of the IATEFL Learning Technologies SIG (Special Interest Group).

Creativity in the English Language Classroom – click on image for free download

Marisa is one of the founding moderators of  a weekly hash tagged discussion of ELT teachers on Twitter which was a finalist in the 2012 ELTon Awards for Innovation in Teacher Resourcesalong with fellow moderators of #ELTchat, one of the first and most popular hash tagged conversations on Twitter every Wednesday  (find more info on the ELTchat blog.)

Publications: Marisa has written materials for young learners and for using literature in ELT; she has published articles in a variety of print and online journals – some can be viewed here – and she maintains the following blogs and websites:

In 2015, she contributed a chapter on the volume on Creativity in English Language Classroom, a topic she has been giving talks on and writing about for the last 15 years or so.

Marisa Constantinides is an Approved CELTA and DELTA Main Course Tutor and trains face-to-face and online.

She is @Marisa_C on Twitter and you can connect with her on Facebook & LinkedIn   



Alexander Makarios – CELTA and Delta Tutor

Alexander is from Greece and has been a teacher since 2004 with experience of teaching a variety of age groups and levels, including Business English, ESP and Academic English. He obtained his Cambridge CELTA Certificate in 2006, his Cambridge Delta Diploma in 2009 (both at CELT Athens) and his MA in TEFL in 2019 from the University of Reading.

Alexander has been a Course Tutor on most of our Cambridge CELTA courses since 2010 and a Cambridge Delta Tutor since 2018.

He also contributes to other courses, such as English for Teachers, while as a Cambridge CELTA Assessor, he also assesses CELTA courses at other centres.

He is one of the blog authors of Cambridge CELTA Blog as well as the blog on this site.

Alexander is an approved Cambridge CELTA and Delta course tutor and a CELTA Assessor.



Angelos Bollas – Online CELTA tutor

Angelos Bollas is from Greece and is a Tutor on the CELT Athens CELTA courses – he obtained his CELTA in 2014 and subsequently completed his Cambridge Delta with us and continued with his MA in English Language Teaching. Currently, he is completing his PhD.

He has experience of teaching in Greece, general and exam classes and in the UK teaching in EAP classes.

He co-moderates #ELTchat on Twitter every Wednesday and is currently serving as a member of the Conference Committee for IATEFL International

At present he lives in Ireland where he is completing his PhD.

Angelos is an Approved CELTA tutor since the summer of 2016. 

He is @Angelos_Bollas on Twitter and his blog is Narratives of a TEFLer 



Alexandra Koukoumialou – CELTA tutor

Alexandra Kouk (as many have come to know her on Facebook and Twitter) is from Greece and has been a teacher of English for more than 20 years. She has a BA in Economics and an RSA Diploma for Overseas Teachers of English (predecessor to the Delta).  More recently, Alexandra  has an Avalon Certificate for Teaching Languages in Second Life as well as her CELTA trainer training course at CELT Athens.

Alexandra ran her own private language school for 10 years in Athens, then joined CELT Athens in 2008 teaching General, Business English and Modern Greek courses and, training and supporting our Distance Diploma in Translation Courses from and into Greek.

She is one of the blog authors of Cambridge CELTA Blog as well as the blog on this site.

Alexandra is an Approved CELTA tutor and supports our Distance Translation Diploma trainees working on the English to Greek course option.




Past tutors and part time trainers 


Peter LevraiDelta ELT Management Online tutor

Peter Levrai is from the UK but has lived, taught, trained and been a manager in a variety of countries, including China, Macau and Finland. He has an MA in English Language Teaching & Materials Development and an International Diploma in Language Teaching Management. Currently, Peter is working on his  PhD in Language Acquisition in Multilingual Settings.In 2017, Peter Levrai won an ELTons Award (with Averil Bolster) for Innovation in Learner Resources (Deveop EAP – a Sustainable Academic English Skills Course)

You can contact him on LinkedIn and Twitter as @LevraiPeter

Delta Module 3 ELT Management Online Tutor 


Nik Peachey – ICT in ELT Online tutor

Nik Peachey is from the UK and is known worldwide as an expert on the use of technology in ELT. He is a twice winner of an ELTons Award, a trainer and now publisher of digital materials for the English Language Classroom. He has collaborated with CELT as an online tutor on courses leading to an ICT in ELT certification.

His website is Peachey Publications where you can readily purchase and download materials for your classes.

His blogs include

He is @NikPeachey on Twitter

George Vassilakis – CELTA & Delta Tutor

George is Greek and has a degree in Philosophy, Psychology and Education, a Cambridge Diploma in English Literature, an RSA/Cambridge Diploma in Teaching English as well as an MA in TEFL. He also has specialist qualifications in teaching grammar and teaching Business English.

As well as working as an English language teacher in a variety of contexts since 1989, George has  worked as a part time teacher trainer at CELT since 1993, and was also Academic Director and Cambridge Exams Manager for the Eurognosi language school chain for three years and Academic Director for Peoplecert Language Exams for eight years. He has published coursebooke and supplementary materials for Macmillan Press

From 2016 to 2020, George Vassilakis worked as a full time trainer at CELT Athens.

You can find out more about him on his blog Detefling


Andy Hockly – Management in ELT Online tutor

Andy Hockley 
is from the UK and is known for his work on the Management of English Language Schools. His book “From Teacher to Manager” is a key text for many ELT management courses and seminars .

His blog is  From Teacher to Manager  

You can find him on LinkedIn and Twitter and you can read more about him here.






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