Ridge Explorations offers Avalanche Awareness and Certification courses as well as back country ski tours. I attended their Level 1 avalanche course with field trips at Steven's Pass this winter.
Its a small outfit with a few instructor/guides, so the same people you see at the lectures will be in the field with you. Their website is well organized with schedule information, packing lists and a forum to coordinate car-pooling to the field trip. You schedule and pay for your course on-line, which worked out really well.
They had lots of course sessions at local outdoor businesses (Marmot, REIs) over the course of a few weeks. There were many field trip options, though all were offered at Steven's Pass.
The instructors have a lot of experience and do a great job of sharing their knowledge with you. If you plan on spending time in the backcountry during winter, become avalanche savvy - it could save your life. read more