Rachel Harding has a background in English-language teaching and is now a full-time author of English-language learning materials. She has written for major English language publishers including Oxford University Press.

Victoria Boobyer is a freelance writer, presenter, and teacher trainer with a background in English-language teaching and teacher management. She has a keen interest in the use of graded readers and the sound pedagogical use of technology in teaching.

Tim Bowen has taught English and trained teachers in more than 30 countries worldwide. He is the coauthor of works on pronunciation teaching and language teaching methodology, and author of numerous books for English-language teachers. He is currently a freelance materials writer, editor, and translator. He is a member of the Chartered Institute of Linguists.

Professor Susan Barduhn is an experienced English-language teacher, teacher trainer, and author, who has contributed to numerous publications. In addition to directing English-language courses in at least four different continents, she has been President of the International Association of Teachers of English as a Foreign Language, and an adviser to the British Council and the US State Department. She is currently a Professor at the School of International Training in Vermont.