To dream that you are in school, indicates that you are learning about yourself with a view to improving yourself. Dream that takes place in school may also be a metaphor for the lessons you are learning in your life. Perhaps you want to return to a state where you were dependent and free from responsibilities.

To dream of skipping school, indicates that you have skipped something important or avoided your responsibilities.

A dream of visiting an old school, suggests you to apply the lessons you learned in the past to your current problems.