classes:  lecturer. Practice taking too many breaks, teachers are not enthusiastic in the instruction (only give lab work then), there is no interaction in the classroom with the teacher leading to heavy class, time-consuming.  curriculum. Practice taking too many breaks, teachers are not enthusiastic in the instruction (only give lab work then), there is no interaction in the classroom with the teacher leading to heavy class, time-consuming.  facility. Practice taking too many breaks, teachers are not enthusiastic in the instruction (only give lab work then), there is no interaction in the classroom with the teacher leading to heavy class, time-consuming.  general. Practice taking too many breaks, teachers are not enthusiastic in the instruction (only give lab work then), there is no interaction in the classroom with the teacher leading to heavy class, time-consuming.