Consider what the particular year in school (1st Grade, 6th Grade, Freshman year, etc.) means to you. For example, 1st Grade might represent childhood, new beginnings, or learning the basics. 7th Grade might represent adolescents or adolescent behavior. Freshman year might represent fresh starts, or a new phase or environment. Senior year might represent being an expert, or being almost done with a phase, worried about achieving a challenge (represented by graduation), having fun, or growing up.
Dreaming that you are in an earlier grade than you actually are, or dreaming that you are still in school when you are actually not, can mean: