Other innovations in enrollment practices, included allowing colleges and universities to admit students with good academic records but relatively low entrance-examination scores. Some colleges were allowed to try an experimental student recommendation system - fixed at 2 percent of the total enrollment for regular colleges and 5 percent for teachers' colleges - instead of the traditional entrance examination. A minimum national examination score was established for admission to specific departments at specially designated colleges and universities, and the minimum score for admission to other universities was set by provincial-level authorities. Key universities established separate classes for minorities. When several applicants attained the minimum test score, the school had the option of making a selection, a policy that gave university faculty and administrators a certain amount of discretion but still protected admission according to academic ability.