If there is only one program available, I'd rather they take students by achievement instead of IQ. If someone with a high IQ is not achieving, it might be more important to figure out why and address the reasons. And if someone does a great job, he/she should be encouraged to do even better regardless of whether the good work comes from effort or innate ability. The difficulty is when high achievers because of very high IQ and high achievers because of great effort are taught the same way.