I recently graduated from graduate school and am currently working in a firm under a contract with a staffing agency. Technically, I would be considered a contract employee under the staffing agency but my 'supervisor" would be my immediate manager at the client site. I was told to provide a weekly invoice for services provided. This is my first, formal job out of graduate school and I am not sure how such a document is typically done.
How is such a document prepared and what I should include in it besides the obvious rate information?