classes: lecturer. some important information of the subject or some changes of the subject should be notified to students through some channels such as the subject website or training portal or forum. curriculum. some important information of the subject or some changes of the subject should be notified to students through some channels such as the subject website or training portal or forum. facility. some important information of the subject or some changes of the subject should be notified to students through some channels such as the subject website or training portal or forum. general. some important information of the subject or some changes of the subject should be notified to students through some channels such as the subject website or training portal or forum.