150-word version:
...It was a science club in my old high school, with the purpose of fostering “mischievous scientists.” After a rigorous interview process, I was finally admitted...

266-word version:
...It was a science club in my old high school, with the purpose of fostering “mischievous scientists.” After a rigorous interview process, I was finally admitted and even elected as the leader of my grade...

285-word version:
“클럽명” was the first club that I ever participated in. It was a science club in my old high school, with the purpose of fostering “mischievous scientists.” After a rigorous interview process, I was finally admitted and even elected as the leader of my grade. Every day, I devised many interesting experiments and discussed their results and ramifications...