CRA is based on the use of visual
representations and a well-developed framework that connects the concrete,
representational and abstract phase for students to attain understanding of
mathematical concepts. This strategy begins with the teacher modeling a
mathematical problem using hands on materials such as manipulatives, then modeling
the mathematical problem using pictures that represent the problem, finally
modeling the mathematical problem using symbols and numbers (Chard, Cook, &
Tankersley, 2013, p. 65). CRA is taught through an explicit teaching model and
can be taught to one student or a group of students. This strategy helps
students learn in a process of steps to create a mental representation of a
mathematical concept in order to gradually build conceptual understanding
needed to successfully solve math problems.