You need to tackle the changes not only in learning, but also in mindset. In middle school, many of you did not have clear targets, so in learning, you may have never strived constantly for your goals. However, in high school, it is very possible for you to realize the benefits of learning, and pay more and more attention to study in daily life.
Your priority in high school stage is to accept the academic competition and study hard. At the same time, you also should spend some time in adapting yourself to the different surroundings including the new faculty and activities. Make sufficient mental preparation for high school, you will adjust yourself more smoothly in the near future.