Here is the full list of all 24 Skool Daze Reskooled achievements.
Complete all levels
Complete all levels with a score of "A" or more
catch the frog 5 times on the same level (Back to Skool)
Complete a level successfully while the headmaster is chasing you
Look how the bully knocks out a little boy while he tries to hit you
Give the box of chocolates to your girlfriend
Knock out "The Tearaway" while he is writing on a blackboard
Unlock all the playable characters
Complete a level without receiving lines (excluding the tutorial)
While playing as Hayley, put the frog on the trophy without stopping the moped
Show the history teacher when he was born
Jump out the secondary floor window (Back to Skool)
Catch Mumps (Skool Daze)
Complete a level with a score of "A++"
Complete Skool Daze and Back to Skool levels in classic with the hints turned off
Reach any of your fellows lines to more than 10,000
Skip a class and ensure the swot will not tell it to the teachers
While skipping a class, don't receive any punishments until the next lesson (Skool Daze or Back to Skool)
Receive a punch from your girlfriend after giving her the box of chocolates
use a rat against the Headmistress
Answer 3 questions right on the quiz mini game in the same lesson
Finish the tutorial
Complete the 3 secondary missions( Skool Daze)
Knock out the caretaker with a branch