nurses' training school
A school that trains nurses. Note that 看護婦 refers specifically to a female nurse; modern usage often prefers gender-neutral terms like 看護師.
She graduated from a nurses' training school and immediately got a job at a hospital.
看護学校 is a more general and modern term for a nursing school, while 看護婦学院 is an older term that specifically refers to a school for female nurses.
Compound of 看護婦 (nurse, specifically female) and 学院 (academy, institute).