How does aimswebPlus work?

In Kindergarten through Grade 8. aimswebPlus uses two types of measures: curriculum-based measures (CBMs)—brief, timed measures of fluency on essential basic skills—and standards-based assessments (SBAs), which are comprehensive measures aligned to current learning standards. 

This composite score represents the broadest indicator of (math or reading) achievement and is the best predictor of success; as such, this score is used to form instructional tiers. Scores from each measure can be used to isolate strengths areas and learning gaps, so all screening measures are used to facilitate instructional planning. Because of their sensitivity to short-term learning, the CBMs are also used for frequent progress monitoring.