Our district seems pretty tough. DD has about 80 kids in her grade and 4 are identified as gifted and put into the "cluster group" (which probably isn't an appropriate name for what it is). For the special magent school kids have to have a composite score on an ability test of 132 PLUS score 98th-99th percentile on both reading AND math achievement tests. If a kid has math and not reading (or vice versa), chances are low they would be accepted. If their composite on the ability test is 139+ they are not as strict about the achievement tests.
DD does have other kids in her class who are not "identified" who do the enriched work if they are able. I doubt any kind of enrichment happens in the classes that do not have the gifted clusters. So there could be high-ability kids in the two other classes who do not get any differentiated work, simply because they missed the cut-offs by a couple points.
