Login into Flavor CRM.
Click on Classes from the left sidebar.
It will take you to Classes list. Select a Class from the list of classes
Class details page will open. Scroll down and click on Update Schedule Icon.
Go to bottom of page and click on Add Schedule
Select Date from Date picker tool
Enter the duration of Class with Start Time and End Time
Select the teacher from list
After entering all the required fields, Click on Reschedule button.