I have my preexam this wednesday and I am very nervous!!Wat  should I do 2 calm down???
Try lighting scented candles. Lavender is supposed to be very calming. Take a relaxing bubble bath the night before your exam while playing relaxing music. Exercising can also help take your mind of your exam since you should be focused on performing the exercise thoroughly. Try watching a funny movie, laughter can help take your mind of it. Try reading a short book (fictional) unrelated to what your study. It could even be one of your favorite books as this will put you in a good mood if you know you already like what your reading. If you make a list of the major points in your exam and just say them out loud before you do all the things i mentioned above it will help give you confidence because you will that your prepared.  Hope this helps.
Get this book and practice these tests.  The tests are timed so practice under time.  The more you get right the better the results. the areas you should study are \nbasic arithmetic word problems no more advanced than simple algebra\nsimple science and mechanical principles\nsimple everyday chemistry\nvocabulary