Marianne is a highly experienced teacher of Social Sciences. At the time of publication, she was teaching at Epping Boys High School, and has taught Business Studies since its inception. Marianne has also taught senior Geography and Economics as well as junior Social Science subjects such as Commerce. Marianne has experience as a year coordinator and for many years took part in the HSC marking of Economics.

Tony is a highly experienced teacher of Business Studies. He has been a HSC exam marker, and has written exam material and books for Commerce, Economics and Business Studies. Tony also presented student lectures for HSC Business Studies in preparation for their final exam. At the time of publication he was HSIE Coordinator at Marist Catholic College Penshurst.

Tim Williams grew up in and around Cambridge, where he went on to study Classics and English at Trinity College. His teaching career started in York and was largely spent at Bedales School in Hampshire, where he became housemaster. He subsequently had a psychotherapy practice in London for fifteen years. His main interests are literature, cultural history, music and the countryside. He is married, has one son and a fine spread of stepchildren and grandchildren; he now lives between the West Country and London.