[Since many physics teachers also teach chemistry, I post this
information, which I found this week. I hope it helps. -- Jane
Jackson]
A dozen graduate online courses in chemistry for high school
teachers (regular, AP & other advanced) are offered by the Department
of Chemistry at Illinois State University.
They count toward two chemistry education master's degrees at ISU;
hence they should transfer anywhere as graduate courses.
Courses consist of assessments on Flinn videos and articles;
discussions, peer review, and reflection papers. Videos were produced
by Flinn Scientific, a major science supply vendor.
http://chemistry.illinoisstate.edu/eLearning/
Typically two courses are offered each semester and each summer.
Tuition for each 3-credit course is about $1360. The application fee
is $50. Teachers can take courses as non-degree students (no
transcripts nor letters of recommendation needed).