Calculus subjects can range from an introduction to functions, either graphical, numerical, analytical, or verbal, to determining the reasonableness of solutions (sign, size, relative accuracy, and units of measurements). Tutors in this subject area will help students understand the connections between these representations of functions. Other units Calculus tutors may help with include but are not limited to: understanding the definite integral, both as a limit of Riemann sums and as the net accumulation of change, and the relationship between the derivative and the definite integral. Calculus tutors will help students pass required math requisites as well as standardized tests.