When I was a little baby, I started learning English.
My first teacher was my mom.
But all words, that she kept in her memory, were "father", "mother", "little brother" and other simple words.
Level of mother's knowledge was the level of pupils in the second form.
So, when I was in the fifth form, I have already been an English teacher of my mother.
However my mom is not me, she was very bad pupil.
And our lessons were finished.
And I think, that I couldn't enjoyed English without my lovely Mother, so I thanks her.