Many parents feel the pressure to prepare their teen for adulthood, but the phrase is so broad that it can become useless. In practice, this usually comes down to a handful of areas that create the biggest consequences first: money, work, schedules, responsibility, communication, and daily life basics.
The goal is not to create a perfectly polished adult before your teen leaves home. The goal is to help them step into adulthood with fewer blind spots, more confidence, and a better ability to handle ordinary responsibilities without panic.