The difference between the Past Simple and Present Perfect can be pretty difficult for non-native speakers. Is it "he walked to school yesterday' or 'he has walked to school yesterday'? Pretty difficult if you ask me. That's why I made this arrangement for you to make sure, that by the end of it, you know the difference between the Past Simple and Present Perfect. You will learn the difference between the two and when to use the Past Simple or the Present Perfect.
First you will get an explanation and shortly after that you are going to practice. In between there will be a diagnostic test to give you a clear view of how much you already know and don't know. At last you have to hand in a creative assignment regarding the Past Simple and the Present Perfect. You will be graded on this.
Good luck!