The USDF has created an "L" program judges' education blog here. You can find the place and time for sessions near you by scrolling down to the Calendar link.
For folks in my area, CVDA has just updated with their new program.
14 hours ago
A working woman and her bay horse relate the trials, tribulations, and tales of dressage training and showing. Featuring the misadventures of Armani, the devious dark-bay gelding, and the honorable Huey, the retired Thoroughbred race horse.