Calculus involves solving complex calculations with the knowledge of various tables of formulas. Anyone learning calculus can benefit from having geometry, trigonometry, integral, and derivative tables and charts to refer to. Teachers often post and use calculus charts when teaching various levels of students in their high school or college level courses. Teacher's assistants also use equation charts with study groups and in individual tutoring sessions. Even someone who has taken advanced levels of Calculus can always benefit from using an equations chart for refreshment purposes.