A comparative study on the effectiveness of written exercises and test frequency in mathematics / by Donabel Montejo-Datahan.–
Effectiveness of modular instruction in the teaching of plane trigonometry to freshmen engineering and technician education students of Southeastern Philippines
The effectiveness of the manual-workbook in college algebra developed by the Davao Association of Colleges and Schools (DACS) mathematics instructors
A study on the modern mathematics achievement of the Tigatto Elementary School pupils during the school year 1971-72