Do you know what book this is?

[Lightclock11]

I used to know the title of a book my English teacher recommended: all families have 2 children in this future world except for one family, which has 3. I cannot remember the title of this book for the life of me... help!

 

[transom]

ender's game by orson scott card

 

[Sweet Cat]

Ender's game!