Castillo, Ylaine Joyce Q. Utilization and effectiveness of activity sheets as distance learning materials in English / Ylaine Joyce Q. Castillo. - Polytechnic College of La Union : [s.n.], 2021. - xii, 137 pages : illustrations ; 28 centimeter. Bibliography: pages 116-117. Subjects--Topical Terms: Teaching--Aids and devices. Dewey Class. No.: TH 371.33 C27u 2021