I would like to add to the discussion about the online course. The original
poster stated they were a bit worried about their full time job (if I
remember correctly), and that the graphics course didn't run because of low
enrollment, so she will be teaching one less courses.
After your course is developed, why wouldn't your board of ed (or
administration) suggest that all appropriate courses be developed online and
then remove the arts specialist? (i.e. Art Appreciation or Art History).
Many states only require their students to have 1 year of fine, practical or
performing art to graduate HS. I can forsee a time where students would be
able to take their 'arts' elective online thus saving the school district
money on the specialist in terms of salary and benefits.