Lev Vygotsky's contribution to defectology became a significant part o
f his overall theoretical legacy. Within his general theory of child d
evelopment, he created a comprehensive and practically oriented paradi
gm of educating children with special needs. This article discusses th
e following topics' relevance to contemporary special education and sc
hool/educational psychology: Vygotsky's views on the nature of handica
pping conditions in children, the principles of psychoeducational eval
uation of the disabled, and the issue of the compensation and educatio
n of children with sensory and cognitive impairments.