The Number combinations within a stage are listed in the order they appear on the fluency interviews, although learning experiences within a stage and across stages can and should be fluid. The interviews include 3 items for each of the number combinations listed.

Critical steps used to support students with foundational addition and subtraction of fractions from building foundations to using reasoning and relationships to fluently retrieving.
Critical steps used to support students with intermediate addition and subtraction of fractions from building foundations to using reasoning and relationships to fluently retrieving.
Critical steps used to support students with advanced addition and subtraction facts of fractions from building foundations to using reasoning and relationships to fluently retrieving.