I have re-written your paragraph in a way that I would consider acceptable. I obviously was not entirely sure about what you were trying to say in some parts, so if it's not quite right let me know and I'll fix it. Here goes:
"Education should be for everyone, not only for gifted individuals. This issue is being addressed in some colleges where it has been noticed that some of the less able students have the ability to grasp the lesson material at the same rate as the more gifted ones. Academic institutions train students to develop a wide knowledge in every subject; not just to memorise the facts, but also how to use them effectively. Looking at my situation, I had been selected as an honors student in University even though I sometimes only got C in some subjects. All students, not just the gifted ones, should be able to obtain a good education".