I have a Ph. D in Mathematics Education from the University of Georgia, USA. Yes I am a proud Dawg.

I have been a Middle and High School Mathematics teacher, Head of Department, Deputy Principal and Principal in schools in South Africa, Namibia and the USA for 16 years.

I have been training mathematics teachers, organizing, attending and speaking at mathematics conferences for 17 years.

I founded a professional society for teachers in South Africa called the School Support Center as well as an online school called the Cloud School. The SSC currently has more than 6,000 members and the Cloud School has more than 117,000 registered students.

I love all mathematics, but especially Number Theory for its power but also its accessibility to all people.

I am a family man, husband to a physical therapist and stay-at-home mom Lise and father to three children - Mieke (18), Johann (13) and Daniel (5). I love sports, especially rugby - played and coached for 19 years. I do road and trail running and have done 6 marathons, 4 multi-day stage races and one ultra marathon.