Malate, Mark Francis L., Development and validation of abacus-based worksheet for mathematics 7/ Mark Francis L. Malate. - Iriga City: University of Saint Anthony, 2025. - 53 leaves: Includes bibliographical references. Subjects--Topical Terms: Abacus-based worksheet.Mathematics instruction.Curriculum validation.Soroban abacus. Dewey Class. No.: 372.7 / M239d