Skill and Concept Measures


Quantile -- Measuring mathematics difficulty

The Quantile Framework has defined almost 500 mathematics skills and/or concepts.  Each of these concepts has a measure.  Each measure shows how difficult one skill is in relation to the others.

The description of a skill and its Quantile measure is called a Quantile Skill and Concept (QSC). The table below shows a few of these skills and their measures.  As difficulty, or demand, of the skill increases, so does the Quantile measure.

Examples of Skills and their Measures (QSCs)

Description Quantile Measure

Identify and name: hexagon, trapezoid, parallelogram, and rhombus.


Solve problems involving elapsed time.


Divide two fractions or a fraction and a whole number.


Solve linear inequalities using the properties of inequality.


Use properties of circles to solve problems involving arcs formed by central angles or inscribed angles.


Solve quadratic inequalities graphically or algebraically.













These Quantile measures are based on introductory instruction.  So, if a student Quantile measure is close to the skill Quantile measure, then the student should likely be ready to learn about that skill when it is first taught.

Learn more about matching measures.