classes:  lecturer. he is very enthusiastic in the teaching process, always helping students during the work as well as making mistakes.  curriculum. he is very enthusiastic in the teaching process, always helping students during the work as well as making mistakes.  facility. he is very enthusiastic in the teaching process, always helping students during the work as well as making mistakes.  general. he is very enthusiastic in the teaching process, always helping students during the work as well as making mistakes.