Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleA C-H-A-L-L-E-N-G-E.AuthorsMassey, Emil L.PublicationSchool Science & Mathematics, 1944, Vol 44, Issue 4, p295ISSN0036-6803Publication typeArticleDOI10.1111/j.1949-8594.1944.tb06078.x