1. Introduction
Professional organizations of mathematics education have attached great importance to affective factors (National Council of Teachers of Mathematics, 2000). According to Bloom (1995), one of the most important and stable indicators of affective student attributes is self-concept; it affects many critical behaviors of the students such as effort to learn, determination when confronted by a problem and participation in the lectures.
The term self is generally used in reference to the conscious reflection of one's own being or identity, as an object
separate from other or from the environment. There are a variety of ways to think about the self with self-concept.
Self-concept is often considered as the cognitive or thinking aspect of self (related to one's self-image) (Huitt, 2011).
Intriguingly, there seems to be diverse opinions on the definition of self-concept