Dr David Martin has been a Lecturer in four universities (Florida Atlantic University, Indian River State College (US), the University of Southern Queensland and the University of the Sunshine Coast). His PhD topic is Problem-based Learning's Impact on Pre-service Teachers' Mathematics Pedagogical Content Knowledge. Prior to his academic career, David held positions in the State School system: Deputy Principal, Dean of Student Discipline, Head of Department: Mathematics, Middle School Mathematics and Literacy Teacher, Primary School Teacher, ESE Teacher Aide and Supply Teacher. He has also earned two Master Degrees in Education (Technology and Leadership), a Bachelor's Degree in Education, and an Associate Degree in Computer Science. David has recently completed his PhD in Mathematics, Curriculum and Pedagogy.