Here is the full list of all 22 No Pineapple Left Behind achievements.
Never hire a vice principal in William
Find the exploit in the Destroy the Union scenario
Lose a scenario due to bankruptcy
End a day without any teachers
Successfully use a Cheating Bolt
Complete both tutorial levels
Turn David into a pineapple
Dehumanize 3 or more children with a single spell
Maximum number of teachers and all special faculty
In Stephen J. Gould School, never lose Fruitbol
A teacher knows all spells and lasers
Turn a child into a pineapple
Remove all children from a school
Been to Nebraska
Use the "Neocolonialism" supply
Disable the tutorial
Win a Fruitbol game with an all-athlete team
End a day with all teachers at maximum salary
No teachers use Televiser; all teachers use max number of supplies
End a day with an A- average or better
Use an Unfriender Nova to remove all of a child's friends
Win the game