The Glass Menagerie can be easily explained as an example of a memory play in its basic taxonomy, the manner in which the scenes are coordinated, and the way in which the main character relates the series of events.
A memory play similar to a stream of consciousness story in that the main character is relating facts as he or she remembers them. In this case, Tom was relating his experiences in and out of the play as they occurred and, in the end, told us what he hoped would become of his mother and sister.
In the same line, the play is performed under an almost surreal light as if ALL of it were a memory. This is what makes some of these plays so extraordinary and entertaining to watch. Finally, a memory play employs a language that reflects the personal views of the main character, and gives us a chance to look within the feelings and emotions of the character in a deeper and more engaging way.