Search Results       Your search for [author]Nool, Nelvin R. returned 1 record.           Development and validation of improvised manipulative material as remediation device in teaching addition and subtraction of integers. by Nool, Nelvin R.; 2009. Subject: Arithmetic -- Study and teaching (Higher) -- udio-visual aids; Manipulatives (Education).          Add to Book Cart Relevance: 24.39%