00721nam a2200217Ia 4500001000700000003000500007005001700012008004100029010002000070040001800090050001500108082001300123245010000136260006900236300002900305500002000334650003700354650005600391700003200447730002400479156781BIBL20160527200625.0770113s1977    vaua          00100 eng    a 77000341 //r91  aDLCcDLCdDLC00aQA16b.M3800a510/.7/114aThe Mathematics laboratorybreadings from the Arithmetic teachercedited by W. George Cathcart.0 aReston, Va.bNational Council of Teachers of Mathematicscc1977.  avi, 226 p.bill.c25 cm.  aIncludes index. 0aMathematics laboratories.2Local 0aMathematicsxStudy and teaching (Elementary)2Local10aCathcart, W. George.2Local0 aArithmetic teacher.