I have been involved in international projects since 2002 (as a Marie Curie Fellow at the Centre for Social Innovation in Vienna) where I had to communicate and produce written materials in English. I was Senior Fulbright Scholar at SAM Houston State University. I speak publicly in English in conferences in Poland and abroad (e.g., in May 2017 I spoke at the National Liberal Club in London using the 2nd Global Teacher Education Knowledge Mobilisation Summit). Since 2004 I have been regularly teaching in English to Erasmus (+) students at the Poznan University of Economics and Business (approximately 2000 teaching hours since 2004), Konya University (Tr) and Karel de Groote School in Antwerp, BE. I have written over 50 different reports, books and articles in English, many of them in peer-reviewed journals. In 2011, I achieved 102/120 score on the TOEFL English test. I have many personal and professional relations abroad, including in the UK, Australia and the USA, which require constant use of English. I have been using English in informal situations, e.g. as a camp counselor in the USA (1995-1997) and workshops (e.g. eTwinning workshop: Leading 21st Century Schools, Hotel Holiday Inn, Berlin International Airport, Berlin, 10-12 Nov 2011). I was a member of organizing committees of numerous conferences where I was communicating with speakers and participants from different countries (e.g. 19th International Management Association Conference, Poznań 2011).