classes:  lecturer. Your teaching is like reading the words in the slides, there are never examples, there are specific demos, vivid.  curriculum. Your teaching is like reading the words in the slides, there are never examples, there are specific demos, vivid.  facility. Your teaching is like reading the words in the slides, there are never examples, there are specific demos, vivid.  general. Your teaching is like reading the words in the slides, there are never examples, there are specific demos, vivid.