classes:  lecturer. Practice instructors should give more detailed instructions instead of letting students do it on their own from beginning to end.  curriculum. Practice instructors should give more detailed instructions instead of letting students do it on their own from beginning to end.  facility. Practice instructors should give more detailed instructions instead of letting students do it on their own from beginning to end.  general. Practice instructors should give more detailed instructions instead of letting students do it on their own from beginning to end.