These sites offer a plethora of free fonts, not only for teachers, but for everyone. I have downloaded fonts from all of these sites. Sometimes the fonts are a little glitchy to install and sometimes they work very easily. For me (on a Mac) all these sites have been virus and spyware free, but as usual… take precautions when downloading anything from the Internet. What I like best about these sites is the variety. I especially like that you can download fonts for movies and TV shows such as the Disney, Battlestar Galactica or Babylon 5 fonts:
This site has fonts in English from styles ranging from ancient to futuristic. This is a multilingual site that offers fonts in Arabic, Hebrew and Thai, just to name a few
This site offers over 300o free fonts, plus 25,000 more fonts for sale. This was the site that has the Disney font.
This site offers fonts in English and Arabic. They have both free and for-fee fonts in styles ranging from military to movies.