classes:  lecturer. It is necessary to teach theory in the machine room so that it can be tested immediately after learning, because learning theory is very boring, not absorbing anything, practice is almost unrelated to theory.  curriculum. It is necessary to teach theory in the machine room so that it can be tested immediately after learning, because learning theory is very boring, not absorbing anything, practice is almost unrelated to theory.  facility. It is necessary to teach theory in the machine room so that it can be tested immediately after learning, because learning theory is very boring, not absorbing anything, practice is almost unrelated to theory.  general. It is necessary to teach theory in the machine room so that it can be tested immediately after learning, because learning theory is very boring, not absorbing anything, practice is almost unrelated to theory.