They really should give this guy tenure. Very down-to-earth, nice to talk to, helpful in office hours, etc. His grading scale allowed me to get an A in the class (grade on final can be final grade in class). He also takes extra credit assignments. He's certainly one of the coolest teachers I've had. You're doing a smart thing by taking his class.

David is probably one of the best math professors that will ever be. He teaches very well in class. He emphasizes not remembering formulas, but actually understanding concepts. His tests are straightforward, and he gives you practice exams that are almost identical to the exams you will take.
He also doesn't curve down. He truly wants as many students to get As as possible.

For our class, it is 20% for each midterm, 20% for quizzes, and 40% for the final. (Or the 100% final option if your score is that good.) Easy first midterm, semi-harder second midterm, and pretty fair final.
Plus, there's an extra credit project that can boost your grade even more.