Undo, Redo
Undo and Redo only lets you undo and redo changes made in the gradebook to grades. Adding/Editing/Deleting Assignments and Students are not undoable.
Cut, Copy, Paste
Cut, Copy, and Paste only work on strings and text boxes within the program.
Delete
Delete removes the currently selected text. If no text is selected, Delete does nothing.
Select All
Select All selects the entirety of the currently selected text field. If there is no text field selected, Select All does nothing.
Find
Find opens up a dialog to search for a particular string in the window you have selected.