I am a retired mathematics educator with 40 years of experience. I started my teaching career in Adelaide in 1976 before moving to Europe in 1993. I have been employed as a teacher/administrator in Sweden, establishing and teaching in International Baccalaureate programmes until retirement in 2016. I was the IB Diploma coordinator 2000-2016. Subsequently I have worked in India assisting a school acquire IB Diploma authorisation and 6 months at the American School of Barcelona as an IB Maths teacher. I work for Oxford Study Courses in UK, USA and Australia preparing IB students for exams. I contribute to the Inthinking web site writing IB exam style questions and web page design.