Oliver, Marjorie Armitage2016-10-312016-10-3119471947b14689868(OCoLC)07829148(OCoLC)ocm07829148https://hdl.handle.net/2144/18932Thesis (Ed.M.)--Boston University, 1947. This item was digitized by the Internet Archive.en-USBased on investigation of the BU Libraries' staff, this work is free of known copyright restrictionsSpaced learning versus unspaced learning in spellingThesis/Dissertation