A university teacher allowed us to use everything during the exam, including a laptop with an internet connection. The only rule was that you weren't allowed to use any communication with other people, like messaging someone or asking questions on forums. Needless to say, everyone passed that exam.

For myself, the most-hated part of every exam session was having to memorize everything. That's what made me fail every single exam I've ever failed. I just can't bring myself to stuff information into my head and then give it back later. It's not a storage device. Yet most other teachers insisted that I need to do everything from memory. 95% of my school and university "education" was to memorize something, then recite it, and then forget it forever.