classes:  lecturer. I think there should be more instructional materials to solve the assignment, study this subject more so that students can learn on their own.  curriculum. I think there should be more instructional materials to solve the assignment, study this subject more so that students can learn on their own.  facility. I think there should be more instructional materials to solve the assignment, study this subject more so that students can learn on their own.  general. I think there should be more instructional materials to solve the assignment, study this subject more so that students can learn on their own.