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).

Here is a short and, hopefully, amusing Pecha Kucha type spoof talk at recent IATEFL International Conference 

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 Resources along 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.


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 recent ones can be viewed below:   

  • Constantinides, M. (2011) ‘Intergating Technology on Initial Training Courses: A Survey Amongst CELTA Tutors”, in International Journal of Computer-Assisted Language Learning and Teaching (IJCALLT) 1(2)
  • Constantinides, M. (2015), “Politeness Principles Across Cultures”, in the Newsletter of the IATEFL Business English Special Interest Group, Summer 2015, Issue 90. 
  • Constantinides, M. (2015) “Creating Creative Teachers” in Peachey, N. and Maley, A. (eds)  “Creativity in English Language Classroom, British Council 
  • Constantinides, M. (2020) ‘From digital curation to content creation‘, in Mavridi, S. and Xerri, D. (eds.) English for 21st century skills. Newbury: Express Publishing. 

She maintains a number of blogs including the #ELTchat Blog which remains a great source of inspiration for teachers around the world.

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   

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 at Leeds Beckett University researching the effects of heteronormativity on LGBTQI+ students’ motivation.

He has experience of teaching in Greece, general and exam classes and in the UK teaching in EAP classes and training on CELTA and Delta programmes.

He was moderator of #ELTchat on Twitter  and for 3 years served as a member of the Conference Committee which organises the Annual IATEFL International Conference in the UK. 

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

Angelos is responsible for a good number of videos aiming to help trainee teachers new to training online with practical tips and advice for different levels. Most of them are used by CELTA trainers around the world as examples of good practices for teaching online. 

Here is a short tutorial on how to set up breakout rooms on Zoom.

Angelos is an Approved CELTA tutor and is the Main Course Tutor for most of our Online CELTA Courses.

He is @Angelos_Bollas on Twitter and his blog is www.angelosbollastefl.com


Mohamed el Mohamady – CELTA tutor 

Mohamed El Mohamady is from Egypt and is a Tutor on the CELT Athens CELTA courses; he obtained his CELTA in 2012 and completed his Cambridge Delta with us in 2018.

He has experience of teaching General English in Egypt and, more recently, English for Specific Purposes in Saudi Arabia where he also works as an Assessment Coordinator for a local Polytechnic.

In the summer of 2019, he followed our CELTA tutor induction programme and has been working with us since.

Mohamed has conducted many workshops and presentations in TESOL conferences inEgypt, Saudi Arabia, United Arab Emirates, Kuwait, and Bahrain, served as a member in the proposal reviewing committee of the TESOL Arabia 25th International Conference & Exhibition. He was one of the contributors in the new publication “More Recipes for the Wireless Classroom”.

At present he lives in Saudi Arabia where he 

He is an Approved CELTA Tutor – he started in 2020 and celebrated his first CELTA course with a great video getting feedback from our trainees. Welcome to our team, Mohamed!

He is   @malmohamady80  on Twitter