hi there, I had a similar problem at agae 9 - and used to get detention to practice - ugh.
What worked for me was one of those really uncomfortable triangle pencil grips, rather than an ergonomic one, and hours and hours of single letter practice. I now have exceptionally neat hand writing and no mental scars! if I'm tier or in a hurry though my writing becomes illegible to even me, eventually I learn't shorthand so I could keep up with the teacher and copy my notes later. Do they still teach shorthand? Maybe your school will allow a secretary's recorder on her desk for her to tape the lesson and copy at her own speed later will you work on the problem.
