How do you write a paragraph about something that happened to you at school?

Start with an opening, which sets the scene. Tell your readers who you are, where you are and what happened. Then introduce the other actors involved, walk your readers through the scenario and finish with whatever the conclusion might have been.

Like: When I was in elementary school I got rabies. I contracted it from my buddy Ed’s pet vampire bat after it bit me. I was rushed to the hospital and got a painful rabies shot, which saved my life. My pissed off father went to Ed’s house, punched his old man and killed the bat. The end.