I was wondering the same thing. Though I ended up taking a brick and mortar macro econ class, I did find that there were several California community colleges that have online options. I think for at least some of them, you would have to show up for some sort of orientation or have in class tests every so often, but there's probably some where you could remain a virtual student the whole semester. Enrollment is probably closed for the summer, but, for fall enrollment, you could check out http://californiacommunitycolleges.cccco.edu/maps/alphaList.asp and manually see which schools have online options. I know that a school in Sacramento and in Pleasant Hill had online courses, and I'm sure there's many more. Good luck.