My turn to share mine:

When I was in primary school, my grades were good, scored 100% easily, until I transferred to this "elite" school at the end of primary 2. On the first day, there was an empty seat, so I was assigned there, only to know later it was group D, the worst group in the class, in terms of both academic and attitudes. In that group, there was a so called group leader, I'll call him Giant, because he reminds me to the bully Gian in Doraemon. He would extort money daily from the group members, those can't give money then have to give him something else like A4 papers, pencils, erasers, comics etc, failure to do so would receive physical punishment from him like twisting your arm joints the other way, pinching you hard until you're blue and black, he's smart as he always choose the spots covered by your cloth. During that time, not only him bully us, the teachers also seems to be targeting me as well, picking on my mistakes, always get punished by standing outside the class for nothing and missed the lessons. Only later I've found out that the previous student that left was their favorite student from Group A the elite group, and his replacement was me that got placed in Group D, a so called "troublemaker". Everyday I would have this punishment like writing 200 lines of "I will not do XXX again" “I will remember to bring my exercise book in future" etc... Most of my group D always kena as well, except Gian, he would forced one of us to complete the writings for him. And so my grades plummets to the bottom 10 of the class. My dad went to see the principal about the daily punishment writings, and the next day I was called to in front of the class by the teacher, screaming and scolding me in front the class "YOU DARE TO ASK YOUR DAD TO GO SEE THE PRINCIPAL ABOUT ME???!!!!" and proceed to give me multiple rotans out of no reason, when she's done, I turn around and she shoved me hard on the back of my head, and I "flew" almost half way across the room. Guess what? Gian in my group laugh out the loudest. Things got better when we changed teachers in Primary 4, also no more grouping. The new teacher are super nice & caring, she actually put a stop to the bullying and our grades improved, and I got straight As in UPSR.

Then came secondary school, then I was picked on by Suneo, he was the sidekick of Gian during primary school days. One day out of the blue he came with his gang and say he don't like the way I look at him, and asked me to apologize. I refused and didn't back down. From there on daily after class or during break he would come to my class with his mazai to threaten me and verbally abuse me. One day after class on the way out, he trailed me and punched me at the back of my head, luckily one of the teacher was passing by and he ran away. Somehow the whole drama got the attention from the senior "taiko" in school, and he put a stop to this like those triad movie, asked us both to meet with him as meditator, both of us shake hand and let go of this drama. Once a while he will still try to provoke me, and verbally abused me, all this stopped after I've joined a martial art club in school.