See if he or she can recommend additional help.
Most colleges have student services.
And often, a professor may be willing to allow a student to do extra work depending on the class policy. In extreme cases, after all options are exhausted and you've spoken to your professor about your difficulties a couple of times, your next recourse is to speak with your academic advisor or the department chairperson. However, Buglione says, you should only use these measures if you absolutely have to, especially if you plan to stay in the class. Such action may only alienate the professor even more, and those who've taught for a long time are protected by tenure, meaning there's little you can do. Ultimately, how receptive your professor will be toward helping you improve your grade comes down to basic human relations, says Buglione.