classes:  lecturer. I went to school in an off-school center, tuition compared to our school in terms of the number of periods is almost equal, but the quality of study is very different, I am guaranteed the right class hours, practice speaking, listening to each lesson.  curriculum. I went to school in an off-school center, tuition compared to our school in terms of the number of periods is almost equal, but the quality of study is very different, I am guaranteed the right class hours, practice speaking, listening to each lesson.  facility. I went to school in an off-school center, tuition compared to our school in terms of the number of periods is almost equal, but the quality of study is very different, I am guaranteed the right class hours, practice speaking, listening to each lesson.  general. I went to school in an off-school center, tuition compared to our school in terms of the number of periods is almost equal, but the quality of study is very different, I am guaranteed the right class hours, practice speaking, listening to each lesson.