Sometimes you'll see a cell that is gray and says "Not Applicable." It's uneditable! This is because Aeries gradebooks connect to our students' attendance records. Sometimes we know something Aeries doesn't and we need to input scores into those grayed-out, Not Applicable cells.
In the top left corner of all gradebooks is a small square that says, "Override Not Applicable / Transfer Grades." Click it! Now those cells are editable and you can proceed.