Berg, Servaas van der (contributor) - 2008
sample design) was smaller
for South Africa than is the norm: “In the SACMEQ II Project, two school systems, South
Africa … behaviour, health, etc.) and perhaps also
the characteristics of the school principal may have played a role in determining … learning
outcomes, in addition to the unobserved ability of the individual pupil. As ability was
unobserved, care should be …