More than 45,000 pupils - around one in 14 students in England, Wales and Northern Ireland - will resit their English GCSE exams next month as a result of the row over this summer's grade boundaries.
Headteachers said it was a "gross injustice" that students will have to do resits after a scandal that was not their fault.
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A rollercoaster has come off the rails at a theme park in Scotland, leaving nine children and two adults in hospital.
"I saw a lot of smoke come out from the tail-end of the aircraft. I wondered if it was normal, whether it was just exhaust fumes."
The House of Commons Petitions Committee has said they will keep an eye on the petition and are concerned about fraudulent signatures.