For Mac OS users, there is a system setting that may not allow you to tab onto several types of elements in a web page. To change this setting:
A combination of numbers and letters is used in grading. The number or letter represents the quality of work done by the student.
A = 90-100; Outstanding Progress and mastery of subject matter.
B = 80-89; Above average progress and mastery of subject matter.
C = 70-79; Average progress and understanding of material.
D = 60-69; Below average progress and minimum passing grade.
F = 59 and Below; Student has not met the class requirements.