If you're looking for upcoming courses in your area to do with avalanche training or Ski instructions then we will keep this page updated for you. The American Alpine Institute does a lot of good training so I highly recommend checking out their page:
https://www.alpineinstitute.com/programs/courses/skiing-avalanche-training/
Their courses take place all over the country with a focus in Washington but you're likely to find something close to you at an affordable rate.
They vary in price from a couple of hundred dollars, to a couple of thousand dollars and the length of time varies form 1 day to 1 week.