"How can I improve my grade?"

First: there is NO such thing as extra credit in my class (other than what you do on the Prep Work)!  So your focus should be on improving your test score.  To do so, ask yourself the following questions:

Remember the following helpful resources:  1) My office hours, 2) Help Sessions, 3) SI Sessions, 4) personal tutoring (only AFTER you have tried all the other PREPAID help listed here!  The math office in Blocker 227 publishes a list of private tutors, but they do not work for the department; arrangements must be made with the individuals).
(NOTE: The online homework company is beta-testing an online (AI) calculus tutoring app for free as well. If interested, the link is HERE).