Dreaming about going back to a large school often symbolizes a desire for knowledge, personal growth, or unresolved issues from your past. Schools in dreams can represent a place of learning and self-discovery, suggesting that you may be in a phase of your life where you're seeking to understand something more deeply about yourself or your circumstances.

The important research paper signifies something significant in your life that you are working hard to complete or achieve. It could reflect feelings of pressure or responsibility, indicating that you are focused on meeting certain expectations or goals.

Waiting for a ride that never shows up may indicate feelings of frustration or a sense of abandonment. This could symbolize a fear of being unprepared or unsupported in your pursuits. It might suggest that you feel stuck or unable to move forward in a particular situation.

Overall, this dream could be highlighting your ambitions and the challenges you face while striving to achieve them. It may be helpful to reflect on areas in your life where you feel you need more support or where you might be placing too much pressure on yourself. Consider reaching out for help or taking a step back to reassess your goals and the resources available to you.