Tim Garry is the site author and has taught mathematics from middle school to university since 1984 and been Head of Maths at three international schools. He has been an IB examiner for external and internal assessment, contributor to IB curriculum reviews, workshop leader and on Maths HL exam writing teams. Tim frequently delivers workshops and conference presentations and has co-authored textbooks for both of the IB Maths courses: Analysis & Approaches and Applications & Interpretation.