You don't need to guess which pair looks best on you — use the eBay Fashion iPhone app to try a pair of glasses you're checking out on a picture of your face.
Most designers with existing labels are finding there aren't comparable fabrics that can just replace what you're doing and shat your customers are used to.
Creatively and effectively use original western teaching reference books and other resources. Prepare enough teaching aids before class and hand in lesson plans every two weeks.
Authors use graphic aids to illustrate and expand on concepts taken up in the text because graphics are yet another way of portraying relationships and clarifying connections.