Free, frequent classes at 11 locations in Los Angeles County on backyard composting, worm composting, grass recycling, water-wise gardening and fire-wise gardening. Worm bins and compost bins available at or near cost for County residents who attend the classes. Has excellent fact sheets and links page. From the Los Angeles County Department of Public Works.
Note: some cities in the County offer their own classes for city residents, for example:
Burbank, California: http://www.ci.burbank.ca.us/index.aspx?page=476
Glendale, California: http://www.ci.glendale.ca.us/public_works/backyard_composting.asp
Long Beach, California: http://www.longbeach-recycles.org/home/index.htm