Deleting data from the grade book
In order to delete a student, a column, a resource, a cell , a tab or a class, tap&hold on that element and Erase
If you'd like to do that in bulk, tap on the Tools icon (top bar) / and either choose Students, Columns, Tabs or Resources.
Select the items to erase and tap on the Bin icon located in the bottom left corner
Restore grade book data: Students, tabs, columns, classes and grade types
Tap on Main menu > Trash
To restore: select items , tap on Restore button.