Wiesje Geldof (pronounced Vee-sha) was born in the Netherlands and both her mother and father were maths educators and authors. Wiesje immigrated to New Zealand in 1979 and completed a B.Sc. in Mathematics and Computer Science at Canterbury University and then went to Christchurch Teachers College. She began her teaching career at Christchurch Girls’ High School and was later appointed Head of Maths at Oxford Area School.
In 1995 she moved to the Bay of Plenty and taught at Te Puke High School. Wiesje has been involved in writing mathematics resources for over 30 years. In the Netherlands she co-authored a series of books for Intermediate school level and while in Canterbury was part of the writing team for the National Curriculum Mathematics textbook series (K. Catley). This series was also published in Britain. In 1998 Wiesje co-founded her own educational publishing company, Sigma Publications Ltd, and began writing Sigma's first titles, the NZMC Homework Book series.
“Maths is an essential skill and all skills have to be practised to become learned. I try to make my maths books interesting and use everyday situations to illustrate the use of maths. I believe write-on books reduce the tedium of copying out problems and make the practice required to become better at maths easier and more enjoyable for students.”