In most Orthodox synagogues, women do not give a "d'var Torah" (brief discourse, generally on the weekly Torah portion) after or between services. Furthermore, many Orthodox synagogues have physical barriers (known as a "mechitzot") dividing the left and right sides of the synagogue (rather than the usual division between the main floor and large balconies), with the women's section on one side, and the men's section on the other. Technically, a "mechitzah" of over four feet or so (ten handbreadths) suffices, even if the men can see the women, though it is not preferable. The mechitza serves to enhance the quality of prayer by ensuring that men are not distracted by the opposite sex. A typical "mechitzah" consists of wheeled wooden panels, often topped with one-way glass to allow women to view the Torah reading.