classes:  lecturer. I think you should add drawings to your slides, or at least during the lecture, you should leave the chair and draw on the board for students to visualize.  curriculum. I think you should add drawings to your slides, or at least during the lecture, you should leave the chair and draw on the board for students to visualize.  facility. I think you should add drawings to your slides, or at least during the lecture, you should leave the chair and draw on the board for students to visualize.  general. I think you should add drawings to your slides, or at least during the lecture, you should leave the chair and draw on the board for students to visualize.