"Before the Internet, the only opportunity most students had to speak with their professors was during scheduled class sessions or office hours. Now, more professors can be in touch with students at any time — morning, noon, and night, seven days a week." [The article focuses mostly on courses that meet only online, but this article does reflect how I use e-mail to enhance my face-to-face teaching.–DGJ]

—The 24-Hour Professor (Chronicle)