A lot of times PBS offers free courses. You can pay to get graduate credit for them, but in my opinion it's not really worth it. Check your local PBS affiliate and see if they have any. You can start at the PBS website. http://www.pbs.org/teacherline/ -Matt
Okay, so as soon as I posted that, I noticed they have prices listed. I suppose my school division is in a local consortium or something that gets the courses for free. Check your local PBS though. It might be free for teachers in certain divisions. -Matt
Check The Fema Offerings Hi, There are several school related offerings. ***Also the USFA college credit offerings might fit what you need. Hille
No CEUs but you get certificates after completing each of these courses in weather http://www.meted.ucar.edu/dl_courses.php