Peeter Mehisto is a winner of several awards in education. Author, trainer, manager and educator, he has extensive experience of working with teachers and administrators to support the implementation of best practice in CLIL methodology. Originating from Canada, based in England and Estonia, Peeter is a frequent presenter and facilitator at CLIL conferences, seminars and workshops. David Marsh has worked on multilingualism bilingual education since the 1980s in Europe and South-east Asia. Maria Jesus Frigols Martin has worked on Foreign Language Teaching Learning since the 1980s, and she specialized in multilingualism bilingual education in the early 2000s.