TY JOUR TI Quality Index of Teacher and Department KW quality index KW percentage of students KW credit KW excellent (A) and good (B) grades KW unsatisfactory (D) grade KW range, quality of work KW optimum value of the parameter KW value of the quality indicator KW average arithmetic value. JO Geometry & Graphics AU Kadykova, N.. AU Vyshnyepolskiy, V.I. PY 2014 IS 2 PB INFRA-M Academic Publishing LLC.