Orion, Wilson Okurut. The impact of instructional materials in the teaching of Mathematic s in a few selected secondary schools in and around Pallisa town , Pal lisa District / Wilson Okurut Orion. - Kampala, 2003. - viii, 38 p. : tabs, maps, graphs ; 30cm. Dissertation (B.A., Ext.) Makerere University, 2003. Includes bibliographical references (p.29). Subjects--Topical Terms: Teaching aids.-------- Dewey Class. No.: 371.33