I can't talk about High School (one more year and I'm a Freshman!) but I guess I could talk about my first year as a teenager. Basically, 7th grade is what I think the transition from childhood to teenage years. 7th grade finished 2 months ago, and here's my thoughts on it.
Initial thoughts - 7th grade was a mainly boring year, nothing compared to the fun in 6th grade. Sure, I made dozens more friends, developed 3x more common sense than I did in 6th, became much more intelligent, and my social skills developed exponentially, but I felt it wasn't as eventful as 6th. Due to my much more developed common sense and intelligence I didn't take place in as much crazy events as 6th, but I came out as a much more friendly person. I never had any enemies, and what you guys consider the "in crowd" weren't as bad as I expected. People around me changed a lot, like for example this girl who was a smart, friendly, nice person back in 6th changed to a showy, dumb, and a bit more... preppy type of person. I didn't try out for the basketball team like I did in 6th, because the nearest basketball court near my house was under construction and I couldn't get a practice. I was much more "internet-based" and I felt the internet was my home for the 1st 3 months of school (GTP). That meant I didn't make much new friends in the 1st trimester.
2nd trimester - I sort of opened up and left the computer for a while. My love for racing grew and I was a more "motorsport" based person than a lurker. I made a couple of new friends and my grades grew even higher. I was in a more happy mood and hung out with my friends a lot more. Things fell in a routine, but then I had developed a crush on this girl in my 3rd-4th period class and every day in school was a more "get her attention" type of day. That didn't mean I spent my whole 2nd trimester trying hopelessly to get her attention (although I did spend the whole PE Unit on Basketball trying) but it was most of the time 70% trying to get her to notice me and 30% hanging out with my friends.
3rd trimester - I developed even more common sense during the spring break and I realized this girl wasn't going to talk to me by chance and I decided to ask her out in the last school dance. Nope. I chickened out at the last minute (the final day when they were going to sell tickets) because I weighed out my options and getting rejected in front of her friends wasn't one of them. (She's very popular, has a jock-like fraternal twin brother, another guy who's friends with her twin brother is very close to her, etc.) So after that I decided to focus my time studying. Testing was approaching, and I needed to be prepared. So I did, testing week went by very quickly, and it wasn't that hard overall. Well, not to brag, but I was in honors classes, and I jumped from 6th grade math to Algebra, so I probably should have lowered my expectations since the English tests were for the average 7th grader. Meh. So after that, the work died down, and I had more time to hang out with my friends than worry about some girl who will never talk to me or grades. That's the time when I had made so much new friends in short time, since I was less worried about work, and I had become much more "higher up" in the social class in my school. Sadly, a boy in 8th grade died during this time, and everyone in his grade was devastated, since he was a popular guy. I didn't know him, but the 8th graders around me in Algebra did. A lot were crying, and this showed the true characters of others in my grade, below, and above. Some people were angry at others because they were crying, but they didn't know the guy. Only 4-5 were joking about it, and they were instantly marked as d:censored:bags. There was a kid who sprayed graffiti on the walls saying,
"Thanks for dying, now we have less homework"
and signed on the bottom the name of a kid who was usually a very "teacher's pet" sort of kid. He was framed, but some people actually believed it was him and he took a lot of blame and hate. Of course people did their best to forget about it, and in 3 days people didn't want to talk about it, and the routine (sort of) went back to normal.
Last week of school - Pretty boring, but it's the closing days of the school year so I guess it'd be nice to separate it. We had activities, award ceremonies, the 8th graders spent the whole week preparing for their graduation, etc. I actually managed to talk to my crush 2 times (though it was a really short talk, and she probably doesn't remember it) and I said farewells to my friends on the last day of school, the usual.
My grades throughout the whole school year:
1st period (English) - A/A/A+
2nd period (Soc. Studies) - A+/A+/A
3rd period (P.E.) - A+/A+/A+
4th period (Science) - A/A/A+
5th period (Tech) - A+/A/A
6th period (Algebra 1) - A-/A/A+
Now - 2 months in the summer break, school starts in 3 weeks, I have a project due for my honors class in the 1st day of school that I've been putting off (I tend to procrastinate, a lot) and it was a boring summer. I didn't get to hang out with my school friends AT ALL during the summer (partly because I don't have my phone anymore) and how I don't have the will to go outside unless my parents take the family somewhere. I've karted a lot, though, and I actually became less shy. Now I'm thinking about school more and more each day (hence me posting here) and I'm thinking of starting the project tomorrow, just to get it out of the way.
tl;dr - First year as a teenager was boring, I developed a massive crush on this girl that I plan to ask out this school year, and I gained more friends.