Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleCENTRAL ASSOCIATION OF SCIENCE AND MATHEMATICS TEACHERS CONVENTION.AuthorsPOTZGER, J. E.PublicationSchool Science & Mathematics, 1948, Vol 48, Issue 7, p577ISSN0036-6803Publication typeArticleDOI10.1111/j.1949-8594.1948.tb06629.x