Schools are now trying to catch up with the work created by delayed Sats results.
The Evening Telegraph reported on Monday how schools including Danesholme Junior School in Corby and Corby Community College had been frustrated by delays in getting their results.
Most schools have now got the results but some will not receive
theirs until September.
Delays have also set back the administrative processes, meaning teachers working overtime to check papers have been marked properly.
Chris Grimshaw, headteacher at Latimer Community Arts College in Barton Seagrave, said: "We've had the results for maths and science in, but we marked a random sample to see if they had been marked correctly and the first 10 were all wrong.
"We are asking for a remark of all the science subjects.
"We haven't had the English results back yet at all. I rang up the marking board yesterday and was told nobody was available to talk to me, which I think is scandalous.
"It's appalling students should sit three exam papers and then not even be able to find out how they did before the summer holidays begin.
"We told students about the situation quite carefully to make sure they didn't get anxious. We've got to assess the English marks before we give them back to the students and the only time that can happen is September.
"It is disgusting and I think the company responsible for this needs to pay compensation to schools across the country."
Examinations officer at Southfield School for Girls in Kettering, Angela Barker said: "We've received all our results now but the whole process has been very confusing.
"We've had lots of conflicting information coming through from the marking board and lots of different emails. At least they have been trying to keep us informed but overall it has been a shambles."
John Kidney, headteacher at Alfred Junior School in Rushden, said: "We got the results a week late.
"We have had to send a few back because of what we believe is incorrect marking, but not an excessive number.
"It's annoying because it has set back our administrative processes."
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