special needs school; school for children with disabilities
Historically used for schools for children with physical or mental disabilities. In 2007, the legal term was changed to 特別支援学校 (special support school), but 養護学校 is still understood and sometimes used colloquially or in older contexts.
See also: 特別支援学校
He teaches at a special needs school.
Nowadays, 養護学校 is often called 特別支援学校.