1, SMS notification: You can send parents the information of course time change by SMS notification. SMS notification can inform parents quickly and conveniently, but you need to ensure that the contact information of parents is correct.

2. Telephone notification: parents can be informed of the change of course time by telephone notification, and they can directly communicate with parents to solve questions and unclear situations.

3. WeChat notification: Parents can be notified of the change of course time through WeChat. WeChat notification can inform parents quickly and conveniently, or solve problems through WeChat group or private chat.