Besides studying, you can make friends and do various activities at school.
At school, other than studying you can make friends and participate in many clubs.
Besides studying / other than studying= 勉強以外、
You can make friends = 友達を作れる
Various activities = 色々な活動
Participate in OO = OOに参加する
Clubs = クラブ、部活
学校の部活のことをよくafter school activites (放課後部活)かextracurricular activities(課外活動)とも言います！
School is not just for studying; it's also a place where you can make friends and participate in various activities.
・School is not just for studying; it's also a place where you can make friends and participate in various activities. 「学校は勉強するだけでなく、友達を作ったり、様々な活動に参加できる場所です。」
他にも少し異なる言い方を紹介します：
・School isn't only about academics. It's also about socializing and joining different activities. 「学校は学業だけでなく、交流やいろんな活動に参加する場でもあります。」
・At school, you don't just study; you also have opportunities to make friends and engage in different activities. 「学校では勉強するだけでなく、友達を作ったり、いろんな活動に関わる機会もあります。」
アメリカ合衆国 
