Anything from elementary arithmetic to calculus.
Here are the courses in the Washoe County School District, private schools, and colleges that I've helped students with:
Algebra
Algebra II
Algebra II Honors
AP Calculus AB
AP Calculus BC
Calculus 3 (college)
College Algebra (MATH 124 at UNR, TMCC, and WNC)
Elementary Math (3rd-5th grade)
Formal Geometry
Geometry
IB Math HL
Math 6
Math 7
Math 8
Precalculus w/ Trigonometry
Precalculus (MATH 126 & MATH 127 at UNR, TMCC, and WNC)
Probability/Statistics/Discrete Math
Statistics
I have also helped students prepare for the ACT and for math aptitude tests for pipefitting and electrical apprenticeships.