I've been aware of Harmony Fine Arts for a while, but I really took a good look at it last week. If you're looking for a chronological survey of art and Western music, this is a great place to start, especially for the upper grades.
There are 3 levels of instruction, based on the classical trivium. Grammar stage for grades 1-4, Logic for grades 5-8, and Rhetoric for high school. Within each stage is a full year program for each grade level. The lesson plan for each grade level includes a weekly schedule, resource list, and supplies needed. Within each lesson, there are 3 levels of depth with which to study, from picture study to a full-on art course (using Artistic Pursuits). Click here to see a sample page for each grade level.
The best thing I discovered this week is that the high school level music appreciation courses are FREE! The 4-year course is broken down into 36 weeks for each grade (9-12), and surveys major composers from Palestrina (renaissance) to Bernstein. The schedule includes a listening schedule, reading assignments, and writing assignments for each section, and would probably lend itself to at least 1/2 credit in music history or music appreciation per year. Click here to download the PDF files for the courses.
The 12th grade Art Appreciation course is also a free PDF download, but grades 9-11 must be purchased. They are $9.95 for the print version or $8.95 for the e-book.