Abstract
While modelling initiatives have been noted for many years, it has also been observed that they have not achieved
a sustained presence in curricula to the extent hoped for. This chapter draws from two extended modelling programs (one
junior secondary and one senior secondary) in identifying and illustrating elements deemed significant for the
successful mounting of sustained programs. Stresses that exist when, for example, modelling as real world problem
solving is attempted in an environment that sees modelling as a vehicle for teaching other content were necessarily
confronted in developing and implementing the initiatives. Such factors are considered as they existed separately within
the respective school contexts, and impacted on the structure of the programs. Finally reference is made to
a contemporary program to indicate how priorities underpinning similar values are currently manifested.