Our elementary GT program operated under the 1 year acceleration plus enrichment model. The enrichment component is very important. It was explained to my kids by at least one teacher that they could cover the curriculum in much less time so the extra time is to dig in deeper and do other related activities. The district develops and provides the enrichment materials for the schools/teachers although with my oldest (a decade ago), I also recall materials developed by GT experts from Williams and Mary and a source from Connecticut (name escapes me).
