If you are struggling to advice or feeling the pressure then watch this video from Carrie Hope Fletcher aka ItsWayPastMyBedTime. Carrie does very good job at giving good advice and retelling the methods she use to implement in order to stop her from suffering from exam nerves.
This respective viewpoint will help anyone struggling with the stress of exams, which I think will be easier for someone to absorb given that it comes from someone who is near their age. She also says about how you shouldn’t let the pressure get to much and just do the best you can.
I think for me as well some of the methods Carrie mentioned helped me and if you would like more advice then there are plenty of videos on YouTube from th serious to the comical.