This page contains links to Astro related course material, some is free others are courses you have to pay for.

Site Link
Free / Open Source  
Astrobits http://www.noao.edu/education/astrobits/course-outline.php
OER Commons http://www.oercommons.org/
Open Learn http://openlearn.open.ac.uk/
Open Math Reference http://www.mathopenref.com/index.html
Open Yale http://oyc.yale.edu/astronomy
National Radio Astronomy Observatory http://www.cv.nrao.edu/course/astr534/ERA.shtml
MIT Open Course Ware http://ocw.mit.edu/index.htm
Astronomy Research based Science Education http://www.noao.edu/education/arbse/arpd/ns
Chandra image processing http://chandra.si.edu/photo/openFITS/casa.html
imageJ http://www.astro.physik.uni-goettingen.de/~hessman/ImageJ/Book/Image%20Processing%20with%20ImageJ/index.html#median
Courses that you pay for
 
Study Astronomy - UCLA http://www.studyastronomy.com
Astronomy by Distance Learning http://www.astronomy.ac.uk