Something I have found quite interesting is that some of the teachers have marked the papers (using a pen and counting the number correct) before we got the papers to enter the data. It amazes me how many teachers have marked incorrectly or added up incorrectly!!
When their marking and mine do not match I have checked the paper again before going on to the next one to ensure I have not entered the wrong answer but so far it has been the teachers.
This makes me think about the data for any of these tests. Teachers are over worked and errors like this can be part of the reason for this happening. I think it would be best for schools to hire teacher aides to enter the data for the teachers.