Well during second grade my son's teacher would get the rest of the class going on 5 daily review questions up on the smart board. During that time she taught my son the topic from the third grade book he was working on that day. Then he did his classwork and even home work while she worked with the rest of the class, he did the 5 review problems too, and he spent time on various math computer sites that the teacher assigned when he finished his work. She also came up with various math projects for him to complete. Granted my son doesn't need much explanation...he gets stuff very quickly.
For some reason the 3rd grade teacher didn't want to do this same method. So different teachers will be more comfortable with this method than others.
