classes:  lecturer. The lecture slide is very easy to understand but after he lectured, we felt that we did not understand anything, his way of communicating made students confused, he did not know how to communicate things that students need to know.  curriculum. The lecture slide is very easy to understand but after he lectured, we felt that we did not understand anything, his way of communicating made students confused, he did not know how to communicate things that students need to know.  facility. The lecture slide is very easy to understand but after he lectured, we felt that we did not understand anything, his way of communicating made students confused, he did not know how to communicate things that students need to know.  general. The lecture slide is very easy to understand but after he lectured, we felt that we did not understand anything, his way of communicating made students confused, he did not know how to communicate things that students need to know.