If you were suspended from school in your dream, then such dream denotes to lost connection with those around you. Maybe you think you are unable to meet other people expectations therefore you feel lost. On the other hand, the dream may indicate the guilt you feel from the things you did in the past.
Dream dictionary: lost in school dream meanings
…Dreaming of seeing young people, is a prognostication of reconciliation of family disagreements and favorable times for planning new enterprises. Dreaming that you are young again, foretells that you will make mighty efforts to recall lost opportunities, but will nevertheless fail. For a mother to see her son an infant or small child again, foretells that old wounds will be healed and she will take on her youthful hopes and cheerfulness. If the child seems to be dying, she will fall into ill fortune and misery will attend her. To see the young in school, foretells that prosperity and usefulness will envelope you with favors….