Here is the full list of all 11 Meet My Teacher achievements.
Finish a level in Very Hard!
Finish 10 levels of Selenia
Finish 10 levels of Cathrine
500 letters written!
You missed 5 times!
Save a picture in the gallery
Finish 10 levels of Althea
100 letters written!
Complete 25 words!
Complete 10 words!
Start your first game!