I would make this class VERY calculator dependent. Teach them all the little tricks that can help them check their answers and answer multiple choice questions without showing work.
In no particular order:
exponents simplifying and performing operations with radicals solving equations (using the graphing calculator) everything about graphing linear equations (using the graphing calculator to identify slope, equation of a line y=mx+b, finding solution sets) factoring parabolas
Questions in these areas frequently appear on Part 1. Remember - this regents can be passed on Part 1 alone if a student can get approximately 17-18 correct multiple choice answers correct. Additional topics can be taught very quickly as you review for the regents (there is always one scientific notation question - done on calculator, etc.)