\input zb-basic \input zb-matheduc \iteman{ZMATH 1998d.02838} \itemau{Van Dyke, Frances; Craine, Timothy V.} \itemti{Equivalent Representations in the Learning of Algebra.} \itemso{Math. Teach. (Reston) 90, No. 8, 616-19 (1997).} \itemab Discusses how students fail to recognize the underlying equivalence when the same set of points is represented by a graph or an equation or a table. Presents activities in which more than one form of representations of the same information are included. (ERIC) \itemrv{~} \itemcc{I23} \itemut{} \itemli{} \end