EDIT: apparently the dictionary supports "acing" to mean "doing very well" even if there are clearly higher measures of performance. Still, "acing" generally means "the highest rank" which would at least be the Distinguished Honor Roll (approx 125-130) if you don't want to go all the way to exact 100% score.
Original post:
> three 6th graders I work with ended up acing the AMC 10, which is a contest that American kids take in the 10th grade. One of them even made the AIME cutoff,
This is 100% impossible.
How could you "ace" a contest and not qualify for the lext level? No one did better than "acing" and there is no lottery.
Do you mean "100" on the AMC 10, not "acing" ? That's impressive and plausible, but "acing" is 150, which is achieved by only about 10 people in the world each year, and takes years of intense study, and all of them qualify for the AIME.
Also, AIME is currently top 2.5% of AMC 10, not top 1%.
Score reports at:
http://amc-reg.maa.org/reports/GeneralReports.aspx