The functions set for teachers are mainly for responding to student's advices and questions submitted by students from the front-end. All the teachers would firstly register for themselves for the sake of information confidentiality and security so that the course information they entered would be presented at the front-end. Moreover, teachers would be offered the access to manage relative information, for example, in order to save the restoring space for data and maintain performance of the whole website teachers can delete information immediately after they have browsed. Finally, teachers can upload files from the back-end as we have mentioned above. Due to the limitation of words, descriptions for those common functions such as making a modification of personal information won’t be presented in details in this section.