In "Math Road Trip," students learn about the concepts of addition, subtraction, multiplication, and division of fractions and decimals; explore ratio and proportion; and investigate scale drawing and rate problems as they plan the ultimate vacation for their families. The Interactive Discovery-Based Units for High-Ability Learners, for grades 6 8, provide teachers with opportunities to use exciting and challenging units in their classrooms. These engaging curriculum units culminate in authentic performance situations that provide students with open-ended opportunities to demonstrate academic understanding. Each book in the series contains tiered lessons that teachers can easily modify to meet individual students' needs.