## Mastery of Certain Mathematical Concepts: By Pupils at the Junior High School Level |

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Algebraic Concepts algebraic number arithmetic mean Business Concepts Butler Test Cent of Mastery central tendency cepts Charles Henry Butler charts chronological age classifications of concepts classifications of schools coefficients of mastery Columbia University computation concepts of equality Concepts of Geometric correct responses correlation degree of mastery displacements eighth grade end of grade equation fundamental Geometric Concepts geometric forms Grade 9 grade distribution grade eight grade nine grade pupils Grade Rankings grade seven grade to grade Grade-to-Grade Gains grade-to-grade interval group of pupils group of schools High School Mathematics high school period high school pupils indicate individual concepts intelligence quotients investigation junior high school mastery coefficients mastery of mathematical mathematical concepts matical means measurement mental age possible rank-ranges S-Group Schorling score-points small schools Table reads Teaching of Junior Test for Mathematical test items test scores three classifications three grades tion Trigonometric Concepts true difference greater University of Missouri weighted mean