Dear Subhendu:
>>I'm a premium member and there is a facility of co-branding WizIQ classroom. Though I have set it in Accounts Settings, I do not find my brand anywhere. Can you please guide?
This facility is available for your private classes.
>>If I wish to end a class before a scheduled time or extended time, how do I end it? I can close the window, but if time is left, the class goes on. Unless the class is finished, feedback form about rating the teacher does not come up.
See the red cross next to where WiZiQ/ your brand is written [top]. Click on it - it ends the class. Let me know if you have any questions. See slide 42 here :
Virtual Classroom Demo.