I originally learned from Marjie Mc Williams on Quilt University.com. That was a awesome series of classes and learned so much. Unfortunately, Quilt University will be shutting down at the end of the year after Carol Miller died earlier this year. Her husband reported to all of the followers that his heart just wasn't in it and so it would close.
I am now thinking about using my own dyed fabrics to get the colors I want when making quilts from my favorite designer Judy Niemeyer.
I just finished a free mini class by Steffani Lincecum; Sewing Machine Feet from A to Z. It was a great mini class, especially since it was free. It covered basic feet, some quilting feet and speciality feet like roller feet, how to make hems, including rolled hems, couching and gathering feet. Didn't take to long and got some good information.
I started the free mini class on making Pixelated quilts and I think I may try this.
I have no stock in Craftsy but have found the classes excellent, enjoyable and so informative. You might take a look at what they have, and it's not just for quilting. Craftsy.com.
Jan