The critique of tracking students by achievement is often accompanied
by demands for individualized instruction or forms of within-class gro
uping. Classroom observations have repeatedly shown that within-class
grouping is rarely practiced in German classrooms, but there is little
research on teachers' attitudes regarding the value and the practicab
ility of different strategies of adapting their teaching to the needs
of heterogeneous classes. The analysis of teachers' opinions on this i
ssue is based on interviews with teachers, principals, and department
heads conducted in five comprehensive schools. They give a vivid descr
iption of their everyday working conditions which in their experience
often preclude the development of complex forms of classroom organizat
ion such as, for example, within-class grouping by achievement. They a
lso point to conditions that are more conducive to a practice of indiv
idualizing teaching strategies Ironically, these conditions are partly
the result of across-class setting by achievement, which allows the e
stablishment of smaller and more homogeneous learning groups and the f
ormation of classes on the basis of students' motivation to study spec
ific subjects. In all, the analysis of teachers' descriptions and argu
ments does not support the view that within-class grouping might be a
viable standard alternative to a more stable system of across-class se
tting by achievement.