。
She saw the children off to school.
Literal
She [topic-は] children [subject-が] school [to-へ] go [nominalizer-の] [object-を] saw-off.
見送る ('to see off') is one of the most culturally-loaded verbs in Japanese — built from 見る ('see') + 送る ('send'), it refers to the formal act of accompanying or watching someone depart, whether to school, work, or further afield. Has a ceremonial dimension at funerals (見送り 'final farewell') and is a daily ritual in many households as parents wave children off in the morning. The directional へ marks the school as destination — slightly more emphatic than に for the directional reading.