Vocational skills are practical or firsthand skills that help a person master a trade or a job. These skills may be obtained on the job or at a vocational school. A vocational school provides technical education to prepare people for work in a trade, craft, or profession
The sentence that uses Standard English is The boy had grown up very quickly. Standard English uses correct grammar and vocabulary, and the first sentence doesn't - it should be <em>The boy grew up very quickly.</em>