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Not anymore. Degrassi supposedly stopped being part middle school since around season 4 (unless Chantay was introduced as an eighth grader instead of a freshman, but retcons make everything screwier). However, in season 10 it was mentioned that Wesley and his classmates have been at Degrassi since 7th grade, which counting the retcon would have been around 2008, yet at the same time now that the students have color-coded uniforms we can see that Degrassi currently is only a high school. So maybe Degrassi stopped being a middle school after 2008?

TLDR: Retcons and the writers screw things up.