School’s out for summer 2009, and instead of getting a jump on the boundless futures that parents and colleges always promised them, students this year are receiving a reality check.

The well-paying summer jobs that in previous years seemed like a birthright have grown scarce, and pre-professional internships are disappearing as companies cut back across the board. Recession-strapped parents don’t always have the means or will to bankroll starter apartments or art tours of Tuscany.

So many college students and recent graduates are heading to where they least expected: back home, and facing an unfamiliar prospect: downtime, maybe too much of it. To a high-achieving generation whose schedules were once crammed with extracurricular activities meant to propel them into college, it feels like an empty summer  eerie, and a bit scary.

“Things have changed drastically,” said Ron Alsop, author of “The Trophy Kids Grow Up: How the Millennial Generation Is Shaking Up the Workplace,” a book that only last year portrayed young workers as entitled and in a hurry. “It has to be a huge wake-up call for this generation.”

Numbers provide the backdrop to the story  not just the grimly familiar national unemployment rate, 9.5 percent in June, but the even scarier, less publicized unemployment figure for 16- to 19-year-olds, which has hit 24 percent, up from 16.1 percent two years ago. Internships available to college students have fallen 21 percent since last year, according to the National Association of Colleges and Employers. Across the country, there are countless tales like that of Morgan Henderson, a student at the University of San Francisco, who, along with friends, planned a big road trip to Las Vegas this summer. With so few of the friends finding jobs, they downgraded plans to a road trip to Reno, then to no road trip at all. They’re spending time watching DVDs at one another’s houses.