1. A calculator for use by teachers for converting numeric scores into student letter grades comprising: means for inputting a high numeric standard and a low numeric standard; means for calculating numeric ranges between said high and low numeric standards, each of said ranges corresponding to a letter grade; means for inputting a student numeric score; means for determining the numeric range encompassing the student numeric score and for determining the corresponding student letter grade; and display means for displaying the corresponding student letter grade.
1. A calculator for use by teachers for converting numeric scores into student letter grades comprising: means for inputting a high numeric standard and a low numeric standard; means for calculating numeric ranges between said high and low numeric standards, each of said ranges corresponding to a letter grade; means for inputting a student numeric score; means for determining the numeric range encompassing the student numeric score and for determining the corresponding student letter grade; and display means for displaying the corresponding student letter grade. 4. A calculator as defined in claim 1 wherein said student score inputting means includes means for inputting several numeric scores for a student, and wherein said calculator further comprises means for summing the several numeric scores.