Teachers in China sell exam results

Just last week did we report about those people in China who used mobile phones to send the results of exam tests to those being tested. This one is slightly different in the sense, that teachers are involved directly - they actually used their cellphones to send messages with the correct answers to students who paid them. "Students and teachers in the scam used text messages and digital cameras to pass questions to other teachers outside the exam room, who then looked up the answers before messaging the answer to the students" - one moment - they had to look the answers up? That actually means that the teachers were not necessarily sure of the right answers and needed to check.