Bana, Jessa Mae E. The implementation of mother tongue based-instruction and its effect on the academic performance of the grade 1 students/ Jessa Mae E. Bana, Feb Aldion S. Constan and Monika B. Mejares. - Digos City: UMDC October 2012. - 44 pages; 30 cm. Subjects--Topical Terms: Elementary Education--Undergraduate thesis. Dewey Class. No.: UT 0389 / B22