Brian Tomlinson is a Visiting Professor at Leeds Metropolitan University. He has worked in Japan, Indonesia, Nigeria, Oman, Singapore, the UK, Vanuatu and Zambia and has given presentations in over fifty countries. He is Founder and President of MATSDA and has published many articles and books on materials development and on language acquisition. Hitomi Masuhara is a Visiting Fellow at Leeds Metropolitan University. She has worked in Japan, Oman, Singapore and the UK and has given conference presentations in over thirty countries. She is Secretary of MATSDA and has published many articles and books on materials development and on language acquisition.