Good morning, Warlock.
Does your daughter attend a college where there are study groups before exams? When I went back to college, a group from our class would meet a day or two before exams and go over the important concepts likely to be on the exam. We would bounce ideas off each other to help us remember, like using key words, associating an idea with a familiar cartoon character or cultural icon, or even a classmate. She needs to take good notes and then condense them and summarize them to as few words as possible to aid in remembering the key points.
It sounds like your daughter panics. A lot of people in our family have panic attacks and anxiety disorder, and it locks up the brain for some reason. She may not be to the point where she needs medication, so some relaxation techniques, biofeedback, yoga, or whatever, might help her to relax. Of course, in addition to all of this, good nutrition, exercise, fresh air and other healthy habits will help.
Hoping I said something useful,
SandraC