Every kid is different, of course, but in our case, our DC successfully skipped from 3rd to 5th (whole-grade), to 7th in math only (not a pre-algebra course) the following year, and to algebra I the year after that. So in math, that was a skip every year for three years running, depending on whether you count 7th grade math as equivalent to pre-algebra, or as a separate course.
Depending on that distinction, we may or may not have skipped pre-algebra, but definitely skipped 6th. The teacher explained her comfort with the acceleration to 7th (which occurred after the first quarter of 6th) by saying that the topics in 6th and 7th were essentially equivalent. Progressing to algebra I at the end of that year was on the basis of performance on an end-of-course exam in pre-algebra.
And wait a minute, and I expect indigo will come up with some useful threads.
