THE STUDENTS
Each of your students is a unique individual, with his or her own likes, dislikes, and feelings. Your students get better or worse at things like academics, sports, and art depending on how much time they spend doing them. Of course your students also want to socialize and they'll make their own friends over time. Some students are more outgoing than others, and some students care more about what people think about them and will only talk to students who dress like they do. All your students will get lonely if they don't talk to anyone, so balancing school work, sports, and social commitments can get pretty rough.
HAPPINESS
Different things make different students happy. Some love hanging out and talking to people, some love going to the gym and shooting hoops. Doing things they like will make students happy and when they have to do things they don't like, they'll get sad. Being lonely makes everybody sad, so finding friends to talk to is important for every student in your school. If you see a sad student, try to figure out what's bugging them by looking in their journal and see if you can help out.
DECISIONS
Your students will decide what to do if you don't give them any orders. They decide what to do next based on what they think about things and how they're feeling.
Socializing
Students will look for someone to talk to when they feel like socializing. Some students enjoy socializing more than others, and they'll try to do it more often. If a student has any friends, they'll try to talk to them if they're nearby. Otherwise, a student will try to talk to whoever's around. Some students prefer talking to other people who dress like they do, and some students are so cool that everyone wants to talk to them.
Deciding whether to talk to somebody
When one student asks another if they want to talk, the one who was asked has to decide whether they feel like talking. They'll say no if they know they don't like the student, if they're already talking to someone they like better, or if they're too busy doing something else.
Activities
Students at Avatar High don't have a class schedule and can go to any activity at any time. Studying at the library makes their grades go up, playing basketball at the gym makes them better at sports, and painting in the art room improves their creativity. Each student has activities they like and ones they don't. When deciding what to do next, students will go to activities they like, but will also go do stuff they don't like if their friends are doing it.
FRIENDS AND DATING
Your students make friends by talking with other students. If students have a lot in common, they'll start liking each other more and eventually become friends. If friends don't talk to each other for a while, the friendship will fade, so friends need to keep up with each other if they want to stay friends.
After a while a student might develop a crush on another student if they like someone enough. If they work up the nerve to ask their crush out, the two students will start dating if the other person feels the same way. If not, the person with the crush will get rejected and will end up having a pretty bad day. Students who are dating like spending time together, but if they don't see each other enough or someone better comes along, someone's going to get dumped...