If you want practice using the flowchart on the symmetry page , look at the molecule and the symmetry elements and try to guess the point group before you look it up. If you think so, email her a list of what molecule you think has the wrong point group and what you think it should be, and a very convincing explanation why. If you're confident and want to do the whole thing, go straight from the molecule to the flowchart to determine the point group, then check your results.
Same caveat applies.