II. THE LEVELS OF UNDERSTANDING GEOMETRY
Realistic Mathematics Education (RME) is a theory of
teaching and learning mathematics which started as a
movement in the late 60s in the Netherlands in an effort of
reconsidering mathematics education, where the
mechanistic approach was dominant until then. Starting in
1968 with Wiskobas [10], a program initiated by the Dutch
government, a new approach on mathematics education
made its first steps offering an alternative to the American
“New Mathematics,” threatening at the time to invade the
Dutch mathematics education [11]. RME is an active and
constantly evolving theory of teaching and learning
mathematics [12]. Indicative of this is the learning teaching
trajectories with intermediate attainment targets which was
first conducted for calculation with whole numbers in
primary school and then extended to measurement and
geometry [13], [14].