"Security / cheating prevention is the most important feature to me. After I started using Exam.net, I would google suspicious student answers to verify that they weren't copied and pasted. They were not, so it really confirmed to me that the exam was secure. No system is foolproof and teachers have to remain vigilant to maintain the integrity of their assessments. However, I found Exam.net to be an excellent resource for reducing cheating and for ensuring that my assessments measure what my students have learned."