Elementary Algebra is generalized form of arithmetic. It provides a language to represent problems and functions. Algebraic thinking is also one of the first forms of abstract thinking that students develop in mathematics.

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Summation Notation also known as Sigma Notation. A simple way of expressing the sum of the values of a sequence. This is seen in PreCalculus, Calculus 1 (AP Calc AB), and Calculus 2 (AP Calc BC).