<http://schema.org/description>
"You can enter a checkmark for a test score by adding the symbol in Grading &gt; Set Grading Symbols."^^<http://www.w3.org/2001/XMLSchema#string>
<https://en-us.help.blackboard.com/Edline/Gradebooks/010_GradeQuick_Web/090_Grading/140_Using_the_Check_Mark_as_a_Grade>