How to prepare for Practical Exam in School

Mostly new students do not know about procedures for Practical Exams and how to perform experiments in lab of School.When I was young,my friends and me worried about about the Practical,Viva Voice,Experiments...But after giving first Practical I felt confidence that it is nothing.

But what preparation you have to do,just do the following steps:

Firstly do all experiments in lab and note all the observations or data.
Complete your Record files(Practical notebooks/files) .
Buy Lab Coat (please for this,ask your teacher).

One day before Practical Exam:

Prepare for Viva(it is only just as oral test) from book.
Complete your record files and cover it.
Learn procedures,material required and theories of experiments.You may also learn observations/data and results of experiments(for accuracy and fastness ).
Take all necessary materials for experiments.

On that day: 

Do not worry about it.It is only as everyday experiment class.
Do experiments and note your all data.And teacher will ask for Viva.
Please do not afraid,teacher only ask simple questions.