PLM utilizes a semester-based modular system for conducting courses , adopts features of the American system ( credits ) , and employs the General Weighted Average ( GWA ) system and a 1.00 to 5.00 grading scale , with 1.00 being the highest possible grade for a particular undergraduate course . PLM utilizes a semester-based modular system for conducting courses , adopts features of the American system ( credits ) , and employs the General Weighted Average ( GWA ) system and a 1.00 to 5.00 grading scale .