When I had problems in school with exams I tried lots of things. 2 worked for me. Before test I would put a sucker int mouth and have that sugar the entire time. It was like the sugar put my brain in overdrive and the answers just flowed. Another that worked for me was when I'd study I would listen to songs I knew all the words to, then when taking the test I'd sing the songs in my head and I'd start to remember what I was looking at and reading while I studied.