Acero, Victorina O. Principles of teaching I/ Victorina O. Acero, Evelyn S. Javier and Herminia O. Castro. - Manila: REX, c2007. - viii, 138 pages; 22 cm. Includes index. ISBN: 978-971-23-4736-8 Subjects--Topical Terms: Teaching--Methodology. Dewey Class. No.: DFil 371.3 / Ac3p