" . . . Repetition is a part of learning, parents and educators agree, but research shows gifted children need far less repetition than most students. Once a gifted child has shown mastery of grade level concepts, or worse, mastery of concepts grades beyond their current level, then what is the value of more repetition?
The gifted child realizes quickly that B follows A, or even further, that C, D, and E come quickly after. He understands inherently why this is, how each step works, and he wants, and needs to continue his progress. But the teacher must gear instruction to 95% of the children in her class. She must proceed from A, to B, to C, and so on, with many repetitions at each step, to reinforce the progression. It will be a very long time until she is ready to address the gifted child's thirst to know what comes after E, after A is introduced and he makes the leaps to B, C, and D in quick succession. This is not progress for a gifted child, it is torture.
Worse, the gifted child often comes into the grade knowing 80% or more of the school year's material. For the gifted child, it's not a matter of repetition of what you're learning. It's a matter of repetition of what you knew when you walked in the classroom door on the first day or school. . . ."
http://www.hoagiesgifted.org/never_say_bored.htmUpside-Down Brilliance: The Visual-Spatial Learner
"Visual-spatial learners are individuals who think in pictures rather than in words. They have a different brain organization than auditory-sequential learners. They learn better visually than auditorally. They learn all-at-once, and when the light bulb goes on, the learning is permanent. They do not learn from repetition and drill. They are whole-part learners who need to see the big picture first before they learn the details. They are non-sequential, which means that they do not learn in the step-by-step manner in which most teachers teach. They arrive at correct solutions without taking steps, so “show your work” may be impossible for them. They may have difficulty with easy tasks, but show amazing ability with difficult, complex tasks. They are systems thinkers who can orchestrate large amounts of information from different domains, but they often miss the details. They tend to be organizationally impaired and unconscious about time. "
I can't find the reference right now, but I've read where research shows that unnecessary repetition can actually impair a gifted student's learning process.