In middle school you have to learn from you mistakes ,for Example have bad habits of not turning in home work ,rise up and over come that habit .
Also try to be in honor class so you can be more prepare of high school , also collect as much info and knowledge to prepare your for college and high school.
In high school you need to have good grades, there is also highschool requirements to follow high school requirements ,The requirements for high school is have four years of English ,three years of math,two years of history/social science,two years of science ,two years of foreign language ,and performing arts.
Also you need to join extra curricular, like sports ,clubs or like honor classes .