Classes designated in the 100s tend to be freshman-level courses, while 200-level courses might suit sophomores and well-qualified freshmen. Classes at the 300 and 400 levels should meet the educational needs of college juniors, seniors, and some graduate-level students.
Upon entrance into college you are required to take basic college courses, also known as core classes. Such courses are designed to prepare students for the more advanced levels of classwork that lie ahead in their academic career.
To get into any four-year college, your GPA should be at least a 2.0 or higher. If you're aiming for selective colleges (less than 60% acceptance rate), you should shoot for at least a 3.5. Remember, these estimates aren't necessarily accurate for every student or every college.
Some colleges and universities operate on the quarter system with the academic year divided into four terms: fall, winter, spring and summer.