I am curious how the transition meeting went for you, if you had it, and wanted to offer up an additional point regarding what the K-6 school may or may not offer. In our school, they do not have subjects aligned easily for going to another grade, due to scheduled "specials" hour (different for each grade) and three lunch periods. In particular, when pullout begins in 4th grade, math is not at the same time as 5th, and the GT teacher works with the group from the two grades separately. So if you're in 4th you'd get the 4th grade extension. You'd definitely want to find out how the K-6 school approaches acceleration.