Question about being able to link accounts


I am a student at Los Altos High School as well as a member of the Los Altos Academy of Engineering. I would like to inquire about whether or not my instructor will able to use his credit card information once, for a group of four students who want to use Cloud9. I am interested if there is a feature that would allow him to make a single account with his credit card information and from there allow four sub-accounts that would be sharing that same credit card information. If that is not an option, is it possible that there could be four different accounts that utilizes the same credit card information?
Thank you so much for your time and consideration!