What do you do in class?

Well.. I recorded the classes. Next I listened again and revised my notes. Next I made an outline.

You began writing in the past tense, recorded and listened. So, your other verbs must also be in the past tense, revised and made. You are talking about what you did the night before an exam. 

You could have writen, I recorded the classes so the night before the exam I listen again. Then I revise my notes and make an outline.  This is saying you recorded the lessons so you can listen again. The change of tense here is continued in the next sentence - revise and make. You are talking about what you do the night before an exam.