classes:  lecturer. I find Thuan's time in class is really inefficient, there are difficult problems and we have to go home to learn, but he does not lecture thoroughly but only raises general academic knowledge.  curriculum. I find Thuan's time in class is really inefficient, there are difficult problems and we have to go home to learn, but he does not lecture thoroughly but only raises general academic knowledge.  facility. I find Thuan's time in class is really inefficient, there are difficult problems and we have to go home to learn, but he does not lecture thoroughly but only raises general academic knowledge.  general. I find Thuan's time in class is really inefficient, there are difficult problems and we have to go home to learn, but he does not lecture thoroughly but only raises general academic knowledge.