The school recorder is traditionally linked to first music lessons and childhood effort. Dream books read it as a simple beginning, and as memories of learning in a group.
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.