What can I draw for culture?

Draw natives dancing in their native costumes.

Culture is a pretty broad word. For American culture, maybe the McDonalds M or big box chain store.

For American culture you can draw Bank of America or AIG…Or powerful V-8 automobiles…or jazz musicians, or baseball game, or apple pie…

Monuments are good, and usually simple to draw.

Do you have a CRT? If so, you can look up a picture of, say, the Eiffel Tower, and trace the silhouette on the paper.

I don’t suppose your teacher meant a Petri dish with bacteria growing in it? No? Ok, then how about a variety of foods associated with different cultures—for example, a hot dog, a taco, spaghetti, and sushi? That would be something simple, recognizable, and distinct.

If your prof has an appreciation for humor, definitely go with @Jeruba‘s petri dish. In addition to the other picture, of course.