Needed for the Pre-Calculus pathway.
Below is how the official curriculum organizes it. Each strand will get full lessons like the ones in Grade 1 Mathematics.
Prime factorization, GCF and LCM; irrational numbers; exponent laws with negative and rational exponents; multiplying and factoring polynomials
Linear relations, slope and intercepts; equations of lines; function notation; systems of linear equations; distance and midpoint