Standing in a school assembly is read as being one among many under a shared set of rules. Dream books link it to conformity, collective expectation and old feelings about authority.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.