There are courses offered on everything from "Teaching Students to Think Critically" to "Internet Safety in Schools." I took a course earlier this year on meeting the needs of English Learners in the classroom. I really enjoyed the format because the professor presented the class with our assignments from the first day, and we had complete freedom in completing each task whenever it was convenient for us. For me, sometimes that was at 2:00 in the morning; others, it was during my planning time. Flexibility is the greatest asset of learning in the 21st century, and that goes for professional learning as well!
If you have any questions about these eLearning courses, please let me know.