Time Ticket dates are available through the Student Resource Center website -- www.drexel.edu/src.

Time Ticket is open to the end of week two -- you can drop or add courses online.
Week Three: Adding and dropping courses no longer permitted.
Weeks Three to Six: Withdraws permitted with instructor's signature.
Week 6 to end of Term: Withdrawing courses no longer permitted.

You can register from anywhere through the Web site and do not have to be on campus.