Exams

I would suggest you to take the exams seriously.

Try to study early morning. wake up at 3 or 4 am and then go for the studies. Morning time is the best to study becuase you remember what all you read in the morning. The memory is most fresh at that time.

Secondly, eat fruits and have juices and almonds. they are good for memory.

Thirdly, go for head massage whenever you can go for it. It will keep you cool and maintained.

To do well in your exams you must keep revising your work and not to fall behind. If there is material which you dont understand you should get it worked out as soon as possible with your teachers/tutors.
I hope youve studied for your exams or at least know what youre doing if you want to do well.

For Portuguese I advise you to speak to someone who is good/excellent at the language and practice with them or listen to audio tapes while you're asleep. But I think your portuguese classe isnt that hard since youre only in grade 9.

For Maths, this is my field xD All you have to do is understand the concept and just do lots of questions over and over again. Make sure you read your questions and double check by working backwards if possible!

Goodluck!!

To day heard something that might help if you have been studing all along. Try listening to classical music befor the test. The classical music is supposed ot stimulate those nuron and help somehow. If you give this a try let me know if it helps.