Fortunately my beginners quilting classes at my LQS wasn't like that. My teachers did stress the importancy of accuracy in both cutting and sewing but at the same time told us over and over again that those things weren't instantly going to come to us. Accuracy is important, but it is some thing we all work toward. It's a learning process. Please tell your sister that she should consider taking a class somewhere else and before she signs up she should let them know about her previous unfortunate experience.