In this lesson, students revisit inequalities of the form or , and are introduced to the symbols to show “greater than or equal to,” and to show “less than or equal to.” Students begin by finding values that are a solution to a given inequality by determining if the value makes the inequality true. Next, they consider how to represent a context involving the phrase “at least” using algebraic notation and graphically on a number line. The necessity for both an equation and an inequality leads to the introduction of the symbols and . Lastly, students use substitution to determine whether given values make different inequalities true or false. Students must attend to precision when they specify the meaning of the inequality symbols and explain which values make each inequality true or false (MP6).