Students usually need to become familiar with the key information or material about an area of study before they can successfully look at its implications, meanings, or interrelationships. However, once they grasp the information in a concrete way, it's important that they move on to meanings and implications.
This occurs all the way throughout adulthood as well I believe. Often times teachers like to start out lessons with out the key information and expect students to know what to do. This almost always sets your students up for failure on what you are learning.