In addition, the population is becoming more ethnically diverse, he said.
Students were becoming more diverse, and schools could no longer take demographics for granted.
"Our portfolio has become very diverse, so we have more protection against big problems in any one country," he said.
Since the 1960s, the population of students taking these assessments has become increasingly diverse.
The school's faculty has become considerably more diverse in recent years.
The racial makeup of the town has become more diverse.
Already, with the scheduled addition of 10 countries next year, the union has become more diverse than ever.
During his leadership, the organization grew further and became more diverse in its membership.
The system of controls and testing has become too diverse.
The city of Atlanta has recently become relatively more diverse.