Five possible options:
-The Teen O5 in "All-New X-Men" (they're not quite the X-Men; they're the weird sub-team of teens that are out of place; and also includes X-23)
-The original New Mutants
-The New Mutants from the Kyle/Yost series (includes Blink and X-Man)
-Spider-Man's team of X-Kids from "Spider-Man and the X-Men"
-Storm's X-Force from Humphries' "Uncanny X-Force"