In college, you can also pick what type of class you want to take, but you also get the options of what days you would like to take the class and at what time.
Another difference is that high school is mandatory. As a child, you are required to go to school. It is stated in state laws and if you do not go to school, you can be put in juvenile detention. A truant officer will come to your house and either escort you to school or take you down to the detention center, you do not have to. No one is going to stop you unless it is your parents, but in reality they can not really say anything because you are an adult. Along with high school being mandatory, it is also free in some cases. You do not have to pay any extra money to attend high school. College is a totally different thing. College can be very expensive depending on if the college is public or private. For example, Wright State University is a public institution and it costs about $10,000 to attend. The University of Dayton tuition is about $25,000. People have to sometimes take out loans to help pay for college, while in high school, you go for free. .
The biggest thing that can be a guiding principle and very important is that in high school, you are usually told what your responsibilities are and if you mess up, they will be corrected if your behavior is out a line. In high school, you have authority figures that are always watching what you do and sometimes waiting for someone to get in trouble so they can punish them and tell them what they did wrong. In college, it is totally different. You are old enough to take responsibility for your own actions, as well as the consequences. An example would be if you get in a fight in high school at Xenia High School, you either get suspended for ten days or you can get expelled if you have been in trouble for fighting before. In college, if you are fighting, you go to jail if someone calls the cops on you.