Riddle Books, created by the Center for Game Science at the University of Washington, aims to develop learners’ understanding of Common Core concepts and support the Math in Focus (Modeling Based Math) curriculum. By using story problems to gradually introduce the player to the notion of equations, Riddle Books starts off with the player manipulating pictures and dealing with relationships they can intuitively understand and enables students to solve story problems regardless of their skill level.
Solve real world problems involving multiplication of fractions and mixed numbers, e.g., by using visual fraction models or equations to represent the problem.
Solve real world problems involving division of unit fractions by non-zero whole numbers and division of whole numbers by unit fractions, e.g., by using visual fraction models and equations to represent the problem.
Use variables to represent numbers and write expressions when solving a real-world or mathematical problem; understand that a variable can represent an unknown number, or, depending on the purpose at hand, any number in a specified set.
Solve real-world and mathematical problems by writing and solving equations of the form x + p = q and px = q for cases in which p, q and x are all non-negative rational numbers.