幼儿园 的英文简写 怎么写 全称是 kindergarten

Kinder.请见以下详述：
abbreviated form of kindergarten
As an insult sometimes,people here use the abbreviated form kinder.Expressions like these are common:
1) What?You still don't know how to spell your name?!I may send you back to kinder!
2) In a language class for college students,they discuss simple vocabulary and grammar.When the students fail to understand,the professor may say:It's like [a lesson for] kinder!
The other common expression is grade one which you can use to replace kinder in my sentences.