High school finals are always a terrifying prospect for Egyptian students. After cheat sheets were leaked this year, the exams turned into a nightmare for Mariam Khaled.

She had gone home to sleep after finishing an exam. When she woke up, she discovered she would have to resit it.

The leaks have put the spotlight on flaws in Egypt's education system, which critics say favours students who can afford private tuition to go on to coveted universities and faculties.