The way of asking questions depends on the teacher. If the teacher draws lots, he can draw by himself. If the teacher calls the roll, he may not be able to call you unless the teacher doesn't have a list and doesn't know you. If you don't want to be pointed out, quitting work may be the safest and most effective way.
Listen carefully in class, take notes and follow the teacher. In most cases, the teacher won't call you by your name. Just asking questions occasionally. The teacher's roll call in class means that students don't listen carefully, make many small moves and don't concentrate.
In fact, being named by the teacher is a good thing, which can make you get better exercise and promote you to study and preview more seriously. If you really don't want the teacher to call your name, try to be an ordinary student who abides by classroom discipline and finishes his homework on time. Clothing, activities, and all aspects of performance are not outstanding. Of course, you can't be famous for your "bad" impression, that is, the kind that won't be too conspicuous and will make the teacher have no special impression.