Concept - “A concept is a name assigned to a category of objects or ideas with common attributes. Concepts are abstract, broad, and universal. They help learners make sense of ideas and information because they help organize and distinguish entities. They help learners look at likenesses and categorize objects or ideas. Concepts are generally stated in one word (for example pattern, probability, habitat, poem, perspective, energy, fraction, number, justice). Sometimes concepts require two or three words to communicate an idea (for example, rights and responsibilities, balance of power, checks and balances, relative size, supply and demand, central tendency, point of view).” (Tomlinson & Strickland, p. 350).
C. Tomlinson & C. Strickland (2005) Differentiation in Practice: A Resource Guide for Differentiating Curriculum Grades 9-12. ASCD.