The public posting of grades by the student's name, social security number, or any other identifier that allows a student to be known is a violation of FERPA. This includes the posting of grades to a class website. As access to electronic communications increases, it may be tempting to send grades by e-mail. However, there is no guarantee of confidentiality when using e-mail.
Leaving personally identifiable graded papers, exams, or lab books open and unattended for students to pick up is also a violation of FERPA.