Foreign students tend to struggle with their speaking examinations. In order to improve you Spanish oral skills there are two simple methods:
1) Watch Spanish Tv series. Watching Spanish Tv series will help you with your vocabulary and will serve as an easy way of learning Spanish idioms . Leaning new vocabulary along with idioms will boost your grades.
2) Speaking and dicussing your chosen topics with a Spanish native speaker. Speaking with a Spanish native will help you improve your fluency and get rid of mistakes that are easily picked by natives.
I am Carlos Higuera Domingo, a Spanish native speaker born and raised in Málaga, Spain and now a Durham University undergraduate student. As a native speaker I think I can improve your Spanish skills using the easiest of the possible ways: Speaking, Speaking and Speaking Spanish.