Concepts include set theory, functions, numeration systems, number theory and properties of the natural numbers, integers, rational numbers, ratios, proportions, decimals, and percents, with an emphasis on problem solving and critical thinking. GCU Traditional Campus - Phoenix, AZ: Instruction for our Spring Semester begins on January 4, 2027, and ends on April 25, 2027 - Final Course Grades are due on May 2, 2027.