To simplify things, we can divide St. Teresa of the Andes' life into three periods which are the following:

From her birth (1900) to her first communion (1910).

From her first communion to her entrance into Carmel (1919).

The eleven months in the Carmel of Los Andes (1919-1920).

You may also consult the Chronology of her life.

For more information about Teresa de Los Andes' life, see the books mentioned in the Bibliography.