We ask several subjective questions in order to learn the level of risk an individual is willing to undertake and the consistency in his or her answers. (rebalance-ira.com)
Another method that would support this would be lower student to teacher ratios, I have read that 3 teachers per classroom would also allow different student learning levels to be met. (teachermagazine.com.au)
Additionally, assessing growth across different learning levels rather than just at the proficiency threshold would eliminate incentives to ignore students already above proficiency or too far below to reach proficiency soon. (educationnext.org)