pre-k- , counting
kindergarten- , more counting and basic addition
first grade- fundamentals of basic arithmetic
second grade-, basic arithmetic
third grade- intermediate arithmetic
fourth grade- , fundamental advance arithmetic
fifth grade- advance arithmetic
sixth grade- pre-algebra, advance arithmetic
seventh grade pre-algebra, probability, basic statistics
eighth grade algebra 1, basic euclidean geometry
ninth grade- algebra 2, geometry, basic trig
tenth grade- precalc, geometry, trig
eleventh- precalc, trig
twelfth grade- calculus