Back to the source
Some teachers let you use your whole textbook for an exam; others aren’t as nice. They will only allow you bring your class notes. They think that you won’t have as much information with you this way, and you will have to rely on what you learned from class.
But it doesn’t have to be this way. You can hack your way around this limitation. You can copy and paste the textbook notes to a document, change its font for a handwritten one, and print it. There is no way anyone will think that it isn’t your actual class notes.