In Speedgrader, it would be great to have an option to sort by grade (for those scripts where grades have already been awarded). Often markers need to quickly scan through marked papers comparing them to each other to check that they are marking appropriately. For example, they might quickly compare a subsample of scripts from different grade bands to check that they are being consistent. This is difficult to do if scripts are not sorted by grade.
NB anonymity needs to be maintained. It is possible to sort by grade in grade centre, but only if scripts have been de-anonymised. Anonymisation is essential for removing marker bias.