Scully, Margaret Mary2017-02-162017-02-1619461946b14690548(OCoLC)07829334(OCoLC)ocm07829334https://hdl.handle.net/2144/20362Thesis (Ed.M.)--Boston University, 1946. This item was digitized by the Internet Archive.en-USBased on investigation of the BU Libraries' staff, this work is free of known copyright restrictionsA diagnostic study of certain difficulties which interfere with pupil progress in senior-high-school mathematicsThesis/Dissertation