classes:  lecturer. If so, then students can ask the lecturer directly. I see the machine rooms are only open when there is practice time, then students have to wait for the lecturer.  curriculum. If so, then students can ask the lecturer directly. I see the machine rooms are only open when there is practice time, then students have to wait for the lecturer.  facility. If so, then students can ask the lecturer directly. I see the machine rooms are only open when there is practice time, then students have to wait for the lecturer.  general. If so, then students can ask the lecturer directly. I see the machine rooms are only open when there is practice time, then students have to wait for the lecturer.