As long as they don't also have to sit in the regular classes and move at the mind numbing pace of the slowest kids in the class. That was required of my daughter in first grade. It destroyed her love of learning and taught her to do only enough in class to stay at the top. We started homeschooling her in third grade when the school would not guarantee that her brother (even more highly gifted) would not have the same teacher she had for first grade. That was the best decision we ever made. Even though we struggled for the rest of her school years with her attitude toward learning (If this is educational, I don't want to do it), she was successful in college and her younger siblings were free to enjoy learning.
I realize people make fun of parents who like having their kids labeled "gifted," but it is just as wrong to ignore the special needs of highly able learners as it is to ignore those who need extra help just to get by in school. I worked in youth ministry many years ago and several of the teens I worked with were quite intelligent, but did not do well in school, even to the point of dropping out. I always believed it was because they were bored silly and just did not see the point in hanging in there.