✔ 最佳答案
At least two years after high school.
Going into college straight from high school, the student has a hard transition time. Issues of independence (too much party), issues of social status (joining a frat) and issues of time and money management all play into the transition into college.
People who have two years (at least) know why they want to go to college and it's not "to define themselves" or even "to find themselves". It's to learn and progress into adulthood. Learning skills for life. Building a career.
That a university offers two years before you have to declare a major is only because students go to school with no sense of direction.
I know this sounds negative so far, but there are some inherent general truths as well. I've had mature students in my classes expecting to be challenged and engaged sitting next to students who feel that they "have" to take this required course and that homework is a "burden".
And this is a general answer. Certainly some recent high school grads thrive in the college environment.
If I were King of the World, I'd have every potential college student spend one year in community college learning....
how to study
how to take notes
how to write a paper
how to research a topic
My ideal college age for a first year would be 22.