I read it here on QB recently, when someone wrote "quilters want to see how it's done, not read instructions" (paraphrased). There's something really insightful about that, because some quilters may be extremely visually-oriented. Also puzzling through someone else's written instructions may be very challenging to someone who is a poor reader. This one student may be a special awakening for you, as the teacher: challenge yourself to invite her back to do the class over again; and study to see how she learns. How she learns best, that is.