"Before The Examination"

On October 23 and 24 we will have our second periodical test. Before this, I need to review my notes in eight subjects. Even do I am busy making projects and others, I must be responsible enough to do all my duty.
It so hard to memorise some of the important parts of our lessons that we have tackled before. Example, in Math and Science, it's hard to memorise the different and too many formulas.
I must read my notes everynight so that I will be ready enough to take the periodical test. Before the examination, I must have enough rest.
Moving on, I will give more attention to my studies.