The primary focal points at Grade 7 are numbers and operations; proportionality, expressions, equations, and relationships; and measurement and data. Students use concepts, algorithms, and properties of rational numbers to explore mathematical relationships and to describe increasingly complex situations. Students use concepts of proportionality and algebraic thinking to explore, develop, and communicate mathematical relationships, including number, geometry and measurement, and statistics and probability. Problem solving in meaningful contexts, language and communication, connections within and outside mathematics, and formal and informal reasoning underlie all content areas in mathematics.