Map of the Earth, that can be printed, with major cities, latitude, and longitude.?

I am a school teacher who is planning an activity to be used in cl. I need to find a printable map of the Earth with latitude, longitude, and major cities marked. Oh, and I cannot download any programs to my work computer (sucks, I know). Can anyone out there point me in the right direction? I've already tried google, but apparently I'm not searching for the right terms.