Well, first and foremost, make a plan to pray and let it reach God. Make a list of things you want to happen in your life academically. Once you are clear about your goals such as expected percentage, Next college for admission, the area where you want to achieve success and so on.
Create a prayer script in your own words including everything you have listened to on the paper. I will suggest that you make a habit to pray at least 5 times a day. If it's not possible at least twice a day and keep your prayer in mind all the time.
Repeating single Prayer for Good Exam Results everyday will help you achieve the stage of speaking in the tongue and manifest your prayers. In addition, remove any doubt from your mind and heart, be very specific, firm and faithful.