Dreams about preparing for school often relate to personal growth, learning, or a feeling of readiness for new challenges in your life. The lip gloss in your dream might symbolize a desire to enhance your appearance or to present yourself in a certain way to others. It could also represent self-expression or the desire to be more socially accepted.

Consider how you felt about school in the dream. Were you anxious, excited, or indifferent? These emotions can provide further insight into your current state of mind regarding personal or social situations in waking life. Overall, this dream might suggest that you are in a phase where you are focusing on self-presentation and how you wish to be perceived by others.